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Author Topic:   Powerglide case swap troubles
wrenchjockey
Member
posted August 20, 2003 10:41 AM
My 'glide case got turned into scrap when I locked up a pinion bearing in the rear end. I had a case sitting here and swapped all the guts from the trans in the car (a 1.76 planetary) into the good case (a 1.82 rear pump). I thought everything would swap as long as I used all of the parts off the 1.76, but when I got all done, I have no reverse. Do I have to install the rear pump and governor from the 1.82 to get my reverse back? Or is there something else I can do?


powerglides
Member
posted August 20, 2003 10:48 AM
Ya... I've run through several different case configurations in the last few years. There's 3 holes that seem to randomly be drilled on the back face of the case. I think there's 1 that all of them have and the other 2 are random. I guess depending on what year it was.

And why not run the rear pump? I was actually quite happy when I bought the last 'glide for $75 and it had a rear pump. It'll come in handy just in case you ever need push started. Without the rear pump, there's no chance of push starting. At least without having other mods to apply the band.



powerglides
Member
posted August 20, 2003 12:35 PM
Thanks a TON for the quick response, powerglides & raz. Will I need to completely disassemble the trans again to drill that hole or can it be done with the extension housing and governor removed? I don't have a governor block off plate, what would be the best thing to use to block the other hole with??

[This message has been edited by wrenchjockey (edited August 20, 2003).]

powerglides
Member
posted August 20, 2003 01:07 PM
I'll try using the rear pump assembly first, since I would rather not have to take it all apart again. I'll let you know how it turns out. Thanks again for all your help.


Raz_900
Member
posted August 21, 2003 08:39 AM
That's right... I forgot about the drive pin for the rear pump. The 1.76 gearset doesn't have the hole for the pin.

I have an HP book on modifying glides and it says that once the rear pump is up to speed that the valvebody will start limiting flow from the front pump and that the rear pump models were a little more efficient at crusing speed or above because the front pump was basically 'turned off' and didn't drag on the motor. Maybe that's wrong and I do understand that 2 pumps (if both working) will drag more. I had a connector on the starter wire break one night and wound up with a DNS... so for me, I'm keeping the rear pump in there!!

FISH_88_MOD
Member
posted August 21, 2003 06:46 PM
there is a seal on the reverse side that needs to be blown out in order to seal!!!!....you dont have to drill anything!....i had this same problem...im not sure what the parts are called but the reverse plate that has all the springs around it that moves into place when you put the car in reverse has a seal that expands when it moves into place!

the seal is stuck and not expanding the way it should....take it back apart and blow air into the reverse vein in the case...(leave the plate and springs in the tranny).....that should fix it!

wrenchjockey
Member
posted August 21, 2003 07:38 PM
I used the rear pump, governor and left out the small gear of the pump, and I have reverse. And the best part is, it's not even 8pm yet. Thanks to all who replied.


wrenchjockey
Member
posted August 24, 2003 09:31 PM
Well, I didn't have a problem with reverse. It ran fine in 2nd gear for 15-20 laps of track-packing, 2 good hot laps, and one lap of green flag racing, then without warning, I lost my 2nd gear in the straight and the motor tached up close to 8,000rpm (ACK!!!), threw the belts and ended the evening. I didn't use a gasket between the rear pump and the case, just the steel plate. I'm stumped. It doesn't try to shift at all, it just sticks in 1st. Bad governor?


Raz_900
Member
posted August 25, 2003 08:43 AM
Band or gov. spring bad/broken?


powerglides
Member
posted August 25, 2003 09:40 AM
The band is only applied in low gear. So I would say low pump pressure or burnt high clutch frictions. Tranny Problems are hard to figure out if you are not VERY familair with them. I would suggest taking it to a good local glide guy.


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