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Old 05-14-2007, 04:13 PM
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Could be a big problem??

Hi my names mariano im from buenos aires, argentina. I have an impala 65 SS with its never opened powerglide but I decided to buy a used trans (TH350)...I have installed in the car......all in place.....clean fluid, clean filter...in appearence all good....shifter OK...modulator OK....kick down cable ok.....then just runs engine and a bad surprise.....Parking OK, Reverse OK, neutral OK, L1 OK........but L2 slipping and D never appears...fluid trought refrigeration lines good.....thats all
When shifter is in D the trans do the 1-2 shift then begins slipping and sounds like a litlle pressure over a friction surface occurs....

Here is very difficult to obtain some info about this trans....and also good parts...

Im begining reading some info about TH350 because I only know powerglide functioning
Thank to all

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Old 05-16-2007, 01:53 PM
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probably needs rebuilt, if you can do a glide you can do this no big deal.
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Old 05-16-2007, 02:05 PM
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my biggest problem is : ive read in any place....this could be naturally clutch discs....or may be the the low and reverse overrun clutch....

today i will meassure the main line pressures.....

and also have a new related question :
have 3 presssure ports
1) The main line ( betwen modulator and accumulator)
2) other one into the accumulator body
3) and the last one betwen dipstick hole and kickdown cable hole.

wich pressures senses into the latest (2 and 3)???

so much thanks

ʹm not an specialist but im very interested in aquire new experiences....up today Ive restored my entire car...except the trans....now is when...
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Old 05-17-2007, 03:36 PM
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Pressure Info Added

Ive meassured the main pressures
All with vacuum conected to modulator
DRIVE, brakes applied, engine 100RPM : 70PSI
L2 and L1, " , " : 92
REVERSE, " , " : 110
NEUTRAL, " , " : 70
DRIVE, brakes off, engine idle: 60
DRIVE, 30-40 MPH, (car on hoist) closed throttle: 60

With vacuum disconected from modulator:
DRIVE, brakes off, engine idle: 115
DRIVE, 30-40 MPH, (car on hoist) closed throttle: 115

I supose governor is not working well.....but I dont know if that are a reasson to slip 1-2 upshift and no 2-3 upshift....

I also dont know why I suspect I have a problem into some roller clutch....I am confussed with this?

Thank you all again

Mariano

PD: sorry for my English!!!
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