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Author Topic:   Powerglide help
RACEINMUD
Dirt Freak

Total posts: 323
posted May 23, 2005 07:52 AM  
Ok, I know most run a three speed due to powerglides breaking. I love my glide, and yes I cracked the case Sat. nite again. It is cracking on the drivers side just past where the tailpiece bolts on. I'm looking for help on correct angles and length of slip yoke. I'm letting the tranny float on the crossmember cause last year I had it solid and cracked in same place. Any help would be appreciated. I'm getting about 3/8 inch travel now on the slip yoke. Thanks! Race

fatman13
Dirt Roller

Total posts: 7
posted May 23, 2005 09:29 AM  

Check your drive shaft, what happens is the driveshaft will arc under power like a bananna causing it to whip. driveshafts can fatuige just like any other parts, we use a 2 1/2 dia. 083 wall, got rid of our problem

sjakes
Dirt Freak

Total posts: 254
posted May 23, 2005 07:55 PM  
Quoted from Bushore, "make sure you have a good BALANCED driveshaft"

I have yet to have an issue with my powerglide, going on 3 years with it. (knocking on wood as I type)*****

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visit us at www.geocities.com/sjrracing


Raz_900
Dirt Forum Champ
Total posts: 635
posted May 23, 2005 09:06 PM  
What driveshaft are you using? A stock one from a metric car is a bit too short. It can work with the longer yoke from Spicer ($60ish)


racerss10
Dirt Full Roller

Total posts: 31
posted May 23, 2005 09:21 PM  
had the same thing happen and the driveshaft was out of balance

powerglides
Dirt Freak

Total posts: 374
posted May 24, 2005 04:51 AM  
If you are racing in drive, a stock driveshaft is not strong enough. Like these guys say the shaft may balance fine but whip at engine speed. Get a new one made.

RACEINMUD
Dirt Freak

Total posts: 323
posted May 24, 2005 08:29 AM  
THanks everyone! Ok, could you please tell me which yoke length is working for you? I was pulling the trans last night and was thinking the yoke must not be going in deep enough and causing the stress. I cracked this all the way through the top of the pan. Thanks again for the help. Race

powerglides
Dirt Freak

Total posts: 374
posted May 24, 2005 08:52 AM  
with a stock metric setup the stock yoke should be fine. With the car seting on its wheels at ride height there should be 1 1/4-1 1/2" between the rear tranny seal and the yoke shoulder.

turnleft44
Dirt Full Roller

Total posts: 45
posted May 25, 2005 12:18 AM  
RACEINMUD, If u tear the glide completely down go to the very back of the case and take out the reverse piston and drill a hole in it 5/32 or a little larger, not very big of a hole is needed. Drill it in or just above the ribbed area in the piston.When u replace the piston place the hole u drilled at the 12 o'clock position. The hole is to relieve pressure that builds up in that part of the case. Mine has cracked before in the same place where yours did but this "cured it".

powerglides
Dirt Freak

Total posts: 374
posted May 25, 2005 04:43 AM  
I would keep that hole to 1/8" A 5/32" hole may cause reverse to slip to much. But there should not be any pressure buildup behind the reverse piston unless you put it in reverse and slam the throttle.

RACEINMUD
Dirt Freak

Total posts: 323
posted May 25, 2005 09:00 AM  
Turnleft & Glides, I'm running the TCI clutchless valvebody setup. I have a holley jet in the valvebody for reverse that I can increase the jetting size. Would that do the same thing as drilling the piston? Thanks a million for your help! Race

powerglides
Dirt Freak

Total posts: 374
posted May 25, 2005 09:05 AM  
yeah the hole in vb does the same thing

RACEINMUD
Dirt Freak

Total posts: 323
posted May 26, 2005 04:10 PM  
Ok, Do all powerglide cases interchange? I got a trans last nite put it is the short shaft. Can I just use the case? Thanks, RACe

    

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