Great video thanks. I’ve just bought a stag and the auto box kept dropping out of gear. Had it looked at and it had been overfilled. Would have never known without these experts to help.
Unfortunately the technical analysis was extremely light weight. Yes lots of talk about fluid but not the various options available for the improved friction materials available for the clutches and bands. Nor was there any discussion regarding the various torque convertors (3 sizes depending upon torque capacity) sprags (a stronger BW51 sprag is a direct fit) valve body options and throttle cams, various sized front servos or range control valves that can be fitted to these transmissions to improve shift performance and durability. The BW35 was a versatile light weight world transmission built to suit engine capacities from 1.5 litres to 4.4 litres (Leyland P76 V8). Even Ford in their 289ci Falcons used a BW35 during the mid 1960s. In OZ they were upgraded to BW40 and BW51 status in Fords big six Efi engines into the 1980s. Many components can be upgraded using the later version BW40/51, even the entire geartrain from a BW40 will fit into an early UK case BW35. As for ATF several types of fluid are available depending upon the frictions and bands used in the transmission for firmer or softer shift quality. Type F generally for the early model BW35 using the original friction specifications and Dexron for later spec frictions within these transmission generally after a rebuild.
Hi - thanks for your feedback. We've always made a point that we are not technical; just a family of amateur mechanics and doing what we can to raise awareness of Stags and to help others on their journey as well. More than happy to have a zoom meeting if you're up for it, to discuss all these various points that again I think others might find insightful as well. Let us know! Kind regards TR Tony
Makes a lot of sense. Never heard of dipping the stick while engine running, thats a great tip. Not knocking his skill but would have thought that if asked to diagnose reason for failure and one if the main reasons is either too much or too little oil, i would have drained all fluid and checked against factory reccomend volume. And also considered having the oil checked for type. Just for the sake of determining what actually caused the plates to deteriorate. Could the plates of actually been ok at purchase time, and be damaged by friction heat build up on the trip home due to low oil level? Cheers
Very informational this has been. Does this suggest if the gear box has been sat a long time (27 years) and we top it up after all this time we are fine or is it wise to actuallly get the auto box looked at? Or will it be fine long as we refilled it before use?
@@ArryTheStag Yes Tony I was thinking more or less the same thing... your gearbox did look like it really needed a proper overhaul anyway and did seem to be on borrowed time... it would have failed on you at some point in the near future regardless of any oil topup you did. I'd say that any transmission that has been sat a long time should have a proper flush and service anyway... it seems that even idling the engine and transmission a few times until they are warm is a good idea to free things up anyway.
@@ArryTheStag Hi Tony, i suppose does make sense, anything mechanical seems to suffer one way or another if not in use. Thanks for taking the time to ask Andy and i share my thanks to Andy for that good piece of info. Looks like we are better off sorting all the mechanical stuff on our old Stag just to be safe. Good job a friend of mine works in recovery if we do go ahead and drive it as is when it gets back on the road! Probably the same for our second Stag which had been sat 15 years then we brought it and broke down due to a engine issue. Probably another can of mess ahead! Kind regards James
Great video thanks. I’ve just bought a stag and the auto box kept dropping out of gear. Had it looked at and it had been overfilled. Would have never known without these experts to help.
Unfortunately the technical analysis was extremely light weight. Yes lots of talk about fluid but not the various options available for the improved friction materials available for the clutches and bands. Nor was there any discussion regarding the various torque convertors (3 sizes depending upon torque capacity) sprags (a stronger BW51 sprag is a direct fit) valve body options and throttle cams, various sized front servos or range control valves that can be fitted to these transmissions to improve shift performance and durability. The BW35 was a versatile light weight world transmission built to suit engine capacities from 1.5 litres to 4.4 litres (Leyland P76 V8). Even Ford in their 289ci Falcons used a BW35 during the mid 1960s. In OZ they were upgraded to BW40 and BW51 status in Fords big six Efi engines into the 1980s. Many components can be upgraded using the later version BW40/51, even the entire geartrain from a BW40 will fit into an early UK case BW35. As for ATF several types of fluid are available depending upon the frictions and bands used in the transmission for firmer or softer shift quality. Type F generally for the early model BW35 using the original friction specifications and Dexron for later spec frictions within these transmission generally after a rebuild.
Hi - thanks for your feedback. We've always made a point that we are not technical; just a family of amateur mechanics and doing what we can to raise awareness of Stags and to help others on their journey as well. More than happy to have a zoom meeting if you're up for it, to discuss all these various points that again I think others might find insightful as well. Let us know! Kind regards TR Tony
Makes a lot of sense. Never heard of dipping the stick while engine running, thats a great tip. Not knocking his skill but would have thought that if asked to diagnose reason for failure and one if the main reasons is either too much or too little oil, i would have drained all fluid and checked against factory reccomend volume. And also considered having the oil checked for type. Just for the sake of determining what actually caused the plates to deteriorate. Could the plates of actually been ok at purchase time, and be damaged by friction heat build up on the trip home due to low oil level? Cheers
Very informational this has been. Does this suggest if the gear box has been sat a long time (27 years) and we top it up after all this time we are fine or is it wise to actuallly get the auto box looked at? Or will it be fine long as we refilled it before use?
@@ArryTheStag Yes Tony I was thinking more or less the same thing... your gearbox did look like it really needed a proper overhaul anyway and did seem to be on borrowed time... it would have failed on you at some point in the near future regardless of any oil topup you did. I'd say that any transmission that has been sat a long time should have a proper flush and service anyway... it seems that even idling the engine and transmission a few times until they are warm is a good idea to free things up anyway.
@@ArryTheStag Hi Tony, i suppose does make sense, anything mechanical seems to suffer one way or another if not in use.
Thanks for taking the time to ask Andy and i share my thanks to Andy for that good piece of info.
Looks like we are better off sorting all the mechanical stuff on our old Stag just to be safe. Good job a friend of mine works in recovery if we do go ahead and drive it as is when it gets back on the road!
Probably the same for our second Stag which had been sat 15 years then we brought it and broke down due to a engine issue. Probably another can of mess ahead!
Kind regards
James