How to Index Your Bellhousing

One of the most misunderstood parts of mating your engine and transmission together is the requirement to index the bellhousing to the back of the engine properly. This alignment procedure allows for better shifting and can prolong the life of the transmission and the pilot bearing. Follow along as we show you the steps required to properly bring your engine and bellhousing together.
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Timestamps:
• 01:02 - Inspecting Mating Surfaces
• 02:37 - Mounting Dial Indicator
• 04:14 - Initial Markings
• 05:35 - Offset Direction
• 06:39 - Installing Offset Dowel Pins
• 07:26 - Re-Indexing Bellhousing
• 08:15 - Checking Bellhousing Parallel
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[@f1hotrod527]

Holley really does a good job with these how to videos. This host is also very good.

[@trentonreynolds2607]

Getting ready to marry up my cryo treated Tremec Magnum to the 623hp 392 Hemi that I won from Holley. This is great information to make sure I don't mess anything up on my project. Keep up the good work guys!!

[@WorkinOnIt]

You won a 623hp 392 Hemi from Holley?!? I'm extremely jealous!

[@monster2269]

Jeremy, great info. At 64, been doing this a long time. I truly can say I learn something new everyday. Thank you Sir. Great job Holley!

[@michaelgrogan3224]

Superb explanation!

[@PANTYEATR1]

This was the best explaination I've watched yet. Good job Holley💪

[@g3garage]

Great video. Very helpful in understanding the importance of aligning the bell housing.

[@robertclymer6948]

Thanks for sharing! Had no idea this was critical. Makes perfect sense though. Well done sir. Blessings from Motown.

[@marktiltins8845]

Yes that was good info doing auto to manual conversation soon with T56F , thankyou 🎯🤙

[@robertlambert5299]

Ol Cleet was banging those gears!

[@WilliamJenkins-tx5jr]

But with offset dowl pins, how does the bolts for the bellhousing line up?

[@BigPermGarage]

Good explanation, thanks. Wondering if highest point is prefered more than the 12 o'clock position though?

[@DocHorn-r7s]

Great Info !

[@mikeskidmore6754]

Just looking at videos like this, makes me think that it would be hard to center the magnetic base.

[@ryanwallace6172]

Will this still work even if there is a large notch where the clutch fork goes?

[@vrm86gt]

good info

[@ZEPRATGERNODT]

Agreed

[@Archangel3083]

Mine never goes into the positive does that matter?

[@doug595959]

also clean flywheel and crank shaft mating surfaces

[@johnbridges5073]

can someone tell me where i can get a drawing/ diagram for the mount bolts to motor for 2003 dodge 1500 4.7

[@abefromen]

what if I don't have any friends to rotate the engine so I can watch the indicator?

[@FL4TFOUR]

Set your phone up to record a video while you’re turning it

[@maggs131]

Nice maeshering 🤭

[@WorkinOnIt]

My dad said it that way - "Mayzure". 🤪

[@alberthodge631]

👍

[@matthewstorm5188]

Is this really THAT important considering that the OEMs don’t do this and that NOBODY bothers to align the transmission to the bellhousing?

[@davecolquhoun9315]

And do not use a tap to chase the threads, use the proper tool

[@coloradotrader7202]

not to mention void the warranty if out of spec