FrontEngineDragsters.Org Forum
Technical => Dan Dishon's Transmission Den => Topic started by: Ponti on June 06, 2016, 07:32:06 AM
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Ok silly question time,
I am sorry now if I keep asking stupid questions, just struggling to find info on the WWW.
Obviously I have asked about shorty covers already in a seperate thread.
What I am trying to find out/ work out is..... Is it possible to convert an early Powerglide to a full manual but still keep the rear pump but loose the governor, so I could do push starts.
Also what are the lengths of the shorty output shafts? I know there are meant to be different lengths.
Box is going to be behind my SBC in my slingshot so no room for a full length tail housing
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I only know TCI builds this
http://www.jegs.com/i/TCI/890/744409/10002/-1
not sure if it will work with a transbrake or shorty kit
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Well you could definitely go manual vb and still keep the rear pump, with no governor. This combo would still be longer than a standard shorty. What kind of over all length can you fit in your car?
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With the the kit for the circle-glide you don't need a rear pump it engages the low band
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Well you could definitely go manual vb and still keep the rear pump, with no governor. This combo would still be longer than a standard shorty. What kind of over all length can you fit in your car?
The distance I have is 86cm from the rear of the motor plate to the front of the axle case, I don't have the front of the 9" so I don't know its length.
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I only know TCI builds this
http://www.jegs.com/i/TCI/890/744409/10002/-1
not sure if it will work with a transbrake or shorty kit
With the the kit for the circle-glide you don't need a rear pump it engages the low band
Have either of you got instructions for fitting this? Used one or know how they work in the way of plumbing.
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The distance I have is 86cm from the rear of the motor plate to the front of the axle case, I don't have the front of the 9" so I don't know its length.
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33.85" + 1.5" for the axle diameter= 35.35" CL of axle to mid plate. Off of the TCI website it says a shorty glide is 19.5"
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You can get the instructions for the TCI kit off their web site. Should be a pdf download. It basically works like a hydraulic clutch you will need a master cylinder and lever/pedal to apply the band. The corse spline short glide is 26" long. Not sure if you have room for that. Or if you could get a coupler with the corse spline.
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bikeguy is right you need a master cylinder and the servo acts as the slave
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Thanks guys. I have dropped the shell of the box in the car and measured it. Hope the attached pictures make more sense of the space and distance left between rear of box and front of axle casing.
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I betting you could fit a corse spline fractory short in and do a direct coupler. Just finding a corse spline coupler would be the hard part. I will try to get you a pic and dimensions over the weekend.
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I pulled out my spare third member and did some measuring
(http://uploads.tapatalk-cdn.com/20160610/e21c0d8d10b5ed9ac501155c9796fb84.jpg)
(http://uploads.tapatalk-cdn.com/20160610/e993984927752bb020dc94a07e1968ed.jpg)
Sent from my iPhone using Tapatalk
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Thanks guys.
This is a big learning curve for me, normal cars are fine ;D it's just working out how to fit parts in a small space and not having the luxurary of flexibility.
Cheers again
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Here is the length of the factory short glide.
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I only know TCI builds this
http://www.jegs.com/i/TCI/890/744409/10002/-1
Well I have been having fun with the TCI kit, ended up chatting to their only support crew and found out that it is an obsolete kit. So what is out there is all there is.
So carried on looking and found that Quick Time now make them ( Few ) .
Only thing now is it says "The Quick Time Automatic Bump Start Kit for Powerglide Transmission is used on circle track vehicles not using an electric starter. This hydraulic actuator bolts on in place of the servo cover allowing you to apply the clutch band to push or bump start the engine on a direct drive Powerglide automatic transmission."
SO, does that mean it won't work at all with a torque convertor. OR how much difference would there be in running the box as a direct drive, like the circle guys do???
Damm, thought this was getting easier, and now I have more questions. Sigh Sorry.
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Running direct drive is not really for your application. A direct slips the band till it gets going. A band is not going to last long doing this on pavement, on dirt they spin the tires like dumping the clutch so it is not as hard on the band. My Dad tells me they use to push start rear pump automatics but said " you have get to haulin ass to make it work" based on that, I would assume a stall converter would make it worse.
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Cheers
I have seen it say about rear pump units need to be pushed about 25 - 30 mph to get it all spinning enough.
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Direct drive is no good for drag racing or street as you bypass the oil from the pump back to the pan to engage you close the valve as fast as possible so the band don't slip too much burning it out.worked good in a dirt modified and the ice racer 35 yrs ago you could always go with a turbo clutch or a clutch flite
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Circle track cars are a rolling start in gear, with a direct drive you could not stage(roll into the beams and stop) and on the last yellow of the tree go from neutral into low with engine rpms up thus slamming the chit out of all the internals
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dreracecar is right, rolling starts only and you could burn it loading on the trailer.
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you need a shortly gear-set and front pump glide. Either buy one already done or speak to Andy Frost to short your stock one. Steve Field can guide you through what's needed inbetween