LS/TH400 Install requires a bolt on adapter
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- เผยแพร่เมื่อ 13 ต.ค. 2024
- The “Ring” adapter wouldn’t allow my torque converter to mate to the flexplate, there was a .200” Gap. 👎
The proper way to mount a TH400 to an LS engine with standard crankshaft flange is to use a 6.0 flange adapter, longer bolts, and a Flat flexplate.
A flat flexplate w/hub adapter puts the ring gear in the same position as a dished flexplate mounted to the flange/hub.
www.novak-adapt...
This man has just saved me countless hours and thousands of dollars trying to put a 4l80 in a 78 camaro you are now a certified Hoss GOBLESS
www.novak-adapt.com/knowledge/gm-crank-spacing
Man, I went to so many different forums trying to figure out what I needed and your explanation was by far the best! Thank you for posting the great info!
Matthew C Thank you for watching and the feedback I appreciate it! JD
Bout to watch it hope I get the same results haha
I have the dished flexplate and longer bolt kit. It bolts on the outside of flexplate. Got it way back when it was cheap. Clearances were good without any grinding but had to elongate my holes. I'm running a 2800 stall FTI converter.
Thanks for the tips on the flywheel and adapters needed. This helped us with a our Jeep LS swap.
Gasratz Customs Thank you for watching and the feedback! I hope you subscribed! JD
@@HeadFlowInc Ohh Yeah! Subscribed!! Give us a follow, you might be able to help us with our projects.
thanks from Eugene Oregon. 5.3 gen four LS in our 69 galaxie convertible project.
Extra help, I was born in Eugene, OR. 1968 👍😎
www.novak-adapt.com/knowledge/gm-crank-spacing
Novac. I paid for a GM adapter to the AMC the 400. I'm now 4 weeks into a 2-week project. The engine was removed 2 times because the flex plate was too thick the 2 one was warped and now waiting for the third flexplate. Called Novac and was told they would talk to the boss and see if I could get some compensation and call me back Tuesday. It's now Sunday did I get a call? Nope. Try Trans dap.
Oneponycar That sucks, it can be a pain in the Arse sometimes! Very frustrating, but you are checking everything which is great! 👍
I knew that adapter was going to be required when you explained it last week. I'm not a.LS guy yet, but the torque conv. cant be pulled out to make up the space, the flexplate has to be moved towards the rear.
Don Rutter Hopefully know for sure it works this afternoon.
The th400 is strong and there's so many fun set ups ,it would be cool to sequencel shift with the monster and B&M and GM, OEM parts mixed, or maximum build🏁🙌🔧🐎🐂 that little welding slag🚀
Matt Gorgoglione I wish I hadn’t gone with a 3000 converter, it’s way too loose of a stall for 2.73 gears in the rear end. I swapped from 3.73’s to 2.73’s so it was manageable on the highway cruising 75 mph. Oops I’ll be switching the converter next Summer. 👍
I've used size ,35 inch tires and transfer case build so 410 gears in a wide body 10 bolt but shattered, and just snagged a newer wide suburban rear 10 with 373 gearing but instead of 8.5 tall it changed to 373 gears 8.6 ten bolt in which can handle the tires but decent on the highway, I've just put it aside untill I do the dreadful check on the weird flexplate or shattered torqueconverter noise , 😑, I'm was just updating myself on your video it's good to do as a mechanic when your doing research or find something else you missed when viewing a great explaination video like this and going to websights and just listening to advice from others🏁🙋🔧, I'm thinking about throwing a keoage torqueconverter in a th400 🏁🔧🙌✨🐎🐂
Glad you got it fixed now to the next step later
Thanks for spending the time to post this info! I almost bought the wrong stuff.
* BuildItLikeBeal Exactly why I wanted to share and save people wasting money! Good luck on your build I hope you subscribed! JD
www.novak-adapt.com/knowledge/gm-crank-spacing
What’s interesting is you can use either flexplate dishes or flat when you have the bolt-on adapter; you either mount the adapter first or after the flexplate depending on which one you have. JD
4.8/4l80e equipped Express and Savana Vans have them as well.
LSX Volvo Guy Interesting, I didn’t know they offered the 80e behind a 4.8, Good information!!! Thanks for sharing! 👍👍👍
Thanks. I'm swapping a 2006 express 4.8 and it already has flat flexplate with spacer. You sir saved me money and a lot of confusion on the web.
Also I ended taking 3mm off of the adapter because the snout bottomed out before it reached the .187" pull out from the Trans. Plus a little wiggle room for forward movement.
I have that spacer on my th350 no issues at all I noticed that your crank side on your converter is allot shorter then mine I have tci converter
blown5.3 All the different combinations of engines, Crankshaft registers, flywheels, and transmissions is clearly outlined on the Novak web page I provided.
There’s a lot more variables than most people realize. Thanks for watching! JD
HeadFlowInc hi there I watch the video you have it’s great I think you’re awesome and I have a question for you if you can answer for me please I have a th400 in the1966 Cadi I wanna swap it to 4.3 Sonoma or Jimmy engine if you think that will fit or if it’s not what should I do to make it fit thank you
@blown5.3 I'm also running a tci converter. The spacing is definitely different and I can't use those small flex plate adapters they sell online
Not to bother you again , but do you happen to know the part number for what starter. 2001+ 6.0 starter is what I’m guessing. I just want to make sure form someone who has already done it. I just Ordered the flexplate and adapted, starter is the last thing and I can start buttoning up the drive train.
Omar Paredes I bought my starter from Advance Auto Parts.
All the LS starters should be the same, I bought mine to fit a 2002 Silverado. Part numbers vary depending on what brands your parts store carries.
Tell them you need a starter for a 2002 Chevrolet Silverado 2500 with a 6.0 👍
Perfect ! Thanks again
So without the welding BB on the converter snout the ring style should have worked right? Also, if you could machine the spacer for clearance why not machine the ring spacer to get the required clearance?
harperjmichael No, the simple ring adapter doesn’t work with a TH400. The TH400 required the “Flat” flexplate and bolt on adapter.
Go to the website in the description, it breaks down which engines/Transmissions and adapters work.
He could have removed some metal from first ring adapter but real issue was the weld slag interfering.
9 minutes 44 seconds or so was issue. Everything before that was wasted time
Hello Sir!!! Have you ever tried a 700R4transmission. I was thinking about using the 700R4. Or would it be more of a pain. I'm really undecided in what direction to go. Thanks for your videos. Keep them coming.
MATTHEW jacobs I’ll be totally honest, the 700R4 is a weak transmission. If you were building a 100% low power cruiser they can work but if you have any real power they just can’t handle it.
If you want/need an overdrive shop around and find a 4L80e. I know the 80e is more costly but it’s worth it. JD
HeadFlowInc,,,thanks for your reply. I have the complete motor and transmission from a 01 Chevy Silverado. It's 5.3. So it's best to keep the combo together. Truthfully I want to use the turbo 350 that's in the 67 Chevy pickup. Just a cruiser nothing fancy,,, Sunday burn out with my kid's.Lol
Thank you for sharing this information greatly appreciated.
Great reference site:
www.novak-adapt.com/knowledge/gm-crank-spacing
Jesus just by the 99-2000 6.0 liter and the Flex plate comes attached with the adapter and that’s it done
Danny Rochester I’m running an aftermarket SFI flexplate now that’s dished with an extension/alignment ring.
It’s crazy how many different ways there are to use the older transmissions on the LS engines. Thanks for watching and the feedback I appreciate it! Stay tuned I hope you subscribe! JD
If you have a long crank early Lq4 you literally need to just bolt the th400 to it as long as the bolt circle for the torque converter is 11.5" Nothing else needed.
FR450 flywheel at the auto parts is the one with the hub save somebody some time off buying new 👍
Appreciate the advice man!
Do anyone know the part number for flexplate 5.3 ls to Th400 at a part store not online
All Flex plates and flywheels require locktight for the bolts to the crankshaft? Red or blue locktight?
Lime Well, you could use either, I chose to use Ultra Black RTV since I know it’ll seal the threads and not let oil seep out. For some reason LS engines will leak oil out the flexplate bolt holes, so I’m told. I can’t stand a leaking vehicle, so I try hard to avoid any potential leaks. 👍
After a year now is it still working I'm doing a Ls to turbo 350 and found this flex plate what do you think part # ATP Z-270 it is a machined plate designed by chevy for $50 bucks thanks you
I believe a TH350 uses the dished flexplate with the converter to crankshaft extension ring. Check out this link:
www.novak-adapt.com/knowledge/gm-crank-spacing
Thanks for getting back to me so soon. Trying to get my 1966 chevy 2 on the road. I'm at work now but will read the forum on lunch. Thanks again. Gave you a like and sub.
I think you’re clearance is was due to the weld slag.
jeremy rock Maybe 🤷♂️. I know I needed way more clearance than what the bb was blocking, at least I think. I don’t have the measurements off hand but there is a significant difference between the “reach” of the “Ring” & dished flexplate compared to the “Bolt on” adapter & flat flexplate. Either way you choose, be sure to verify the required space between the seated torque converter and mounting surface on the flexplate. 👍
HeadFlowInc thanks for the advice I’m going to be mating my 02 4.8 to a th350. The 4.8 was originally mated to a manual tranny I think I will go with the flex plate you used I don’t like the idea of egging the holes out to the torque converter
jeremy rock Never grind the tabs on the converter, it’s best to work the flexplate. But like you saw this flexplate worked fine no mods. 👍
Are u sure you converter nose was Not extended to work on ls swaps? Did u compare the converter with an old th350 converter
tim m I didn’t/don’t have any other converters handy. I know the converter wouldn’t have reached the register on its own.
After removing the slag and machining the crank end the Ring Adapter would have worked.
@OMRY1561 - 4 min ago
Hi nice video Great information
I have 1967 cadillc th400 and 429 engine
Do I need any adapter if i install 350 It1 gen2 to the
th400 thank you
Very sorry for the late reply
www.novak-adapt.com/knowledge/gm-crank-spacing
Probably sums question but you put that adapter behind the flex plate directly on the engine first?
It depends on whether you have a flat flex plate or a dished flex plate. If you have a flat flex plate the adapter goes on the crankshaft first, if you’re running a dished flex plate you put the adapter on the Transmission side of the flex plate. It all depends on which application you have.
@@HeadFlowInc I have the dish flex plate. Bevel side
I also had to notch the plate to get in to line with the TC
Using early model 4l60E
Does the adapter come with the 4L80 flex plate or do you need to purchase it separately?
Sorry for the late reply, many of the flex flights come with it if it’s specified for a 6.0 80e. Unfortunately, I don’t know for sure which manufacturers included it or not so just make sure to verify before you purchase..
i am doing a swap oon a 1994 5 speed maual 1500 it was an slush box but automatics make me sick lol to few gears and 4l60 gearing is terrible slow shift and just never know what thier doing in playing slid ways boom a shift n Tq slop n go the old truck 4l80 seems ok but i drove a 2005 mustang auto it was the first auto i did not hate but slop n go was an issue been nice in a truck i think it had 5 gears and felt like spacing was logical
*Flywheel: 2001-07 truck. NFW1050
*Clutch: 2002 Camaro Z28/SS or better.
*Bronze extended reach pilot bushing. #26112
This should be a decent place to start doing an LS swap if you keep the 5 speed.
@@HeadFlowInc thanks man i know about old supras 5mge 7mge like that lov the help
Did you have to use spacers for the torque converter mounting tabs to the flex plate
No I did not need spacers, I’ve never had good luck running spacers without having vibration issues.
If you need spacers they need to be precision flat and all exactly the same.
I wouldn’t waste time or money on a B&M converter either. JD
@@HeadFlowInc I’m running the same flexplate with bolt in spacer with a th400 converter from jegs which is said to be the exact same as b&m. I’m not running spacers either. Thank you
I have a 4L60E in my C5 and want to add the th400. Is this all I need? Or should I get a clutch assembly also? Thanks
GreyC5 You would not need a clutch assembly to run an automatic transmission. If you are going TH400 then yes the bolt on 6.0 adapter and flat flexplate is what you need. You will also need a different length driveshaft and crossmember to make it work. Iirc
HeadFlowInc ok. And I was told that with some models it takes a clutch to start the car and put it in reverse. Maybe they misspoken? Lol. How much do you think that would run me to have someone create that stuff.
GreyC5 There are specialty Race transmissions like a Liberty, Jerico or similar where it launches with a clutch and shifts like an automatic. This does not apply to a regular automatic like a TH400.
Honestly, I have no idea how much it would cost, to many unknown variables. Parts quality/price, level of work done/needed, and Labor cost per hour.
HeadFlowInc I gotcha. Thank you for the insight and knowledge . I appreciate it man.
GreyC5 Good Luck make a build sheet so you know how much it’s going to cost. This way you won’t have as much down time due to unforeseen cost. 👍
It on the wrong side the dish is face out so when the flexplate bents you inward
It depends on which transmission and which engine/crankshaft register length. One way doesn’t fit all applications.
www.novak-adapt.com/knowledge/gm-crank-spacing
Where did u connect the vacume line that the th400 uses i have a 03 silverado that im swaping a 400 in.? Thx in advance.
On the Passenger side of the early truck intake there is an unused vacuum port that’s sealed, all you have to do is open the end. I’ve also drilled/tapped/installed a barb fitting to the oem plastic intakes. JD
@@HeadFlowInc Thx 👍
Ya out have the flex plate backwards?
Nope you’re wrong, but thanks for watching!
Go learn more about LS to old school GM transmissions here.
www.novak-adapt.com/knowledge/gm-crank-spacing
What torque converter are you using?
I’ve gone through 3 converters so far! I haven’t installed the 3rd one yet.
1. Don’t waste your money on a B&M anything especially the Holeshot 3000 it’s cheap junk.
2. I had decent success with a TCI 10” Super Street Fighter w/anti ballooning plate 3500-3800.
3. New converter is the “Entry” level boost PTC 10” w/anti-ballooning plate spec’d for my combo.
*** The best Bang for the Buck converters are the Jegs XHD 10” built by TSI. Decent price and a solid/proven performer up to 800+ wheel HP. JD
@@HeadFlowInc thanks for the quick response and the advice!
Excellent video. Thanks
www.novak-adapt.com/knowledge/gm-crank-spacing
Looking to install a T400 in my 2005 5.3 silverado what all do I need for the conversion?
www.novak-adapt.com/knowledge/gm-crank-spacing
Drive shaft, shifter and Torque Converter. Maybe move or modify the crossmember I’m not sure. JD
@@HeadFlowInc thanks Very helpful !!👍
How did you connect the kick down cable
M Gar TH400 doesn’t use a kick down cable, it uses an electric solenoid triggered by a micro-switch. You can setup the kick down by either mounting a switch near the throttle on the engine or throttle pedal. I want to hook mine up but haven’t done it yet. Thanks for watching and the question! JD
@@HeadFlowInc are there any conversion kits for connecting that switch or will I just have to fabricate something up
I think I have the solution for my application its called a pedal kickdown switch. It bolts right up to the pedal assembly on a 72 chevelle. I originally had the switch located on the carburetor but since I will be swapping to an Ls with drive by cable and throttle body I had to find a different option for the kickdown switch.
Thanks for the tip, I’ll look into one of the peddle switches, I’d like to have a functional kick down! JD
I did this on my 2009 truck motor that had a dish and went to flat and spacer and now starter sounds like crap
Try this link, I’ve heard others having issues finding a starter or needing shims.
www.novak-adapt.com/knowledge/gm-crank-spacing
Awesome
great vid !!!!
thanks for the info i have a 700r
www.novak-adapt.com/knowledge/gm-crank-spacing
I have a Lq9 6.0 what do to use my t400 I
Peter. Hatch As long as you don’t have the extended flange like the early 1999/2000 6.0 then the bolt on adapter and flat flexplate will work for a TH400 or 4L80e
Check out the link in the description for the break down of the engine/transmission/flexplate combos. 👍
Good tech 👍
Good information 👍
Is this the same for an LY6 to th400?
Tommydco Yes, check out the link in the description, it will clarify everything. Thanks for the feedback I appreciate it! JD
I put mine together and it started clinking really bad and I did it just like how they said with just the adapter to the TH350 and we all know that's a lie!!
Is that a B&M torque converter
Yes very loose B&M Holeshot 3000 converter. It didn’t stay very long, I’m using a TCI Super Street Fighter 3500-3800 w/anti-ballooning plate #241002 until I can afford to upgrade. JD
Do you think the B&M 20484 would work good
I’ll be honest, I’ve never used a B&M converter I’d recommend to anyone because they’re cheaply made for the price. You can get a entry level PTC converter for +- $500.00-$550.00 shipped. I can’t justify spending over $400.00+ on a B&M.
The only off the shelf converter id recommend is the Jegs XHD converters made by TSI. Currently on sale for $337.99 are excellent quality with dual anti-ballooning plates rated at 800hp. Check them out in the stall range you need, if going turbo make sure it’s big enough to get into boost. JD
I'll let you know I found a pretty decent torque converter for really cheap look these guys up Freakshow torque converters
Let's not forget this is the same guy that didn't know why the ears busted off his transmission when his torque converter wasnt fully seated .
That’s a bold face lie, I’m sorry you’re so lonely.
This video is misleading. The spacer would have worked. This issue was slag on converter from beginning.
Keith Walker It depends on which flexplate you use, I would not use the ring adapter with a dished flexplate it’s a cheesy pos but lots of people do. It’s a choice we all have to make. JD
Link to the website please
www.novak-adapt.com/knowledge/gm-crank-spacing
www.jegs.com/i/JEGS/555/601010K/10002/-1
Is there suppose to be space between the flywheel and torque converter
@HeadFlowInc I have the flat flex plate and the spacer and there is still a gap between the flex plate and the torque converter what should I do now
6.0 flexplate 2002
meathead1011980 This is a 6.0 flexplate 😉. All 6.0 flexplates are “Flat”, the early 6.0 has a .400” extended crankshaft register/hub 1999-2000 used the flat flexplate no adapter. The 2001-up 6.0 uses the bolt on adapter, seen in my video, to properly locate the flexplate to the starter. 👍
HeadFlowInc yeah I got the years mixed up... mines is made on to the plate... I can’t unbolt it... this is good info because I didn’t know that... thank you my guy
Adapter is for flat flex plate
I have 2006 6.0 on a 4L80E it's the original engine with the original trans ..the problem I'm having is that the flexplate keeps breaking around the bolts which is around the bolt on adapter(spacer)..do you know what could be the cause of this?..its my work van and it has 523,000 miles runs great and shifts smoothly. I never had any work done on the trans except change fluid and filter..
I forgot to mention, it's a flat flexplate with bolt on spacer from autozone (pioneer brand) 5th one purchased
i like it good job thanks
Manuel Figueroa The Novak guide shows the truth about all the old school transmissions to the LS engines! Thank goodness I found this information on what works! JD
www.novak-adapt.com/knowledge/gm-crank-spacing
How about a 700 r4 to LS
Check out this guide:
www.novak-adapt.com/knowledge/gm-crank-spacing
Did you bait us into watching another video....WOW
I hope so! Sorry I just found this post from a year ago! JD
👍👍
Great video, thank you.
TFETTER There’s lots of great information available now through ITC billet and the Novak website. Good luck on your project! JD
@@HeadFlowInc thank you Sir, love the channel 👍