4R70W Disassembly - TCCoA Forums
 
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post #1 of 11 (permalink) Old 09-21-2003, 04:10 PM Thread Starter
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4R70W Disassembly

I am taking apart the original 4R70W from my '95 Cougar to see how it goes together, and how worn/burnt the friction material is etc, but I can't get one shap ring off, and that is preventing me from getting half the internal parts out. Does anyone know how to get the snap ring in the picture below out of the transmission (what tool is required)?



And don't worry about the scratches... This transmission will never be put into a car again...

'95 Cougar - 2002 Explorer engine, 2004 Mustang PTP2 PCM

Best times:
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2004.5 Silverado Crew Cab/Long Bed/4x4 6.6L Duramax: [email protected] (Weighing in at over 7200#) on 10/19/2007
Dyno - 446.4RWHP/820.2RWTq on 6/13/2008
Pulling - 300.9' 3rd place finish 8/2011
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post #2 of 11 (permalink) Old 09-21-2003, 05:34 PM
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Flat head screwdriver and several band-aids for when it slips and goes into your hand...

seriously

96 LX 4.6L
13.215 @ 103.09
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post #3 of 11 (permalink) Old 09-21-2003, 07:38 PM
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no.

You need a good set of snap ring pliars. See the holes for the snap ring pliars? Not the cheap kind, buy something that looks like its well made.
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post #4 of 11 (permalink) Old 09-21-2003, 09:14 PM
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Are you sure?

When I did the mod on my tranny, I had a set of nice snap-ring pliers on hand, and I'm pretty sure that that ring does not have the holes.

I used a jack to SLIGHTLY lift up the piston, and a flat-head screwdriver to pop out the ring.

-Andrey

96 LX 4.6L
13.215 @ 103.09

Last edited by MadRussian; 09-22-2003 at 10:32 AM.
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post #5 of 11 (permalink) Old 09-21-2003, 09:20 PM Thread Starter
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That one does not have holes... that's wgy I'm asking how to get it out...

'95 Cougar - 2002 Explorer engine, 2004 Mustang PTP2 PCM

Best times:
PI 4.6L 95 XR7 Cougar: [email protected]
2004.5 Silverado Crew Cab/Long Bed/4x4 6.6L Duramax: [email protected] (Weighing in at over 7200#) on 10/19/2007
Dyno - 446.4RWHP/820.2RWTq on 6/13/2008
Pulling - 300.9' 3rd place finish 8/2011
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post #6 of 11 (permalink) Old 09-21-2003, 09:22 PM
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you are right, i glanced at it quickly and thought it was the reverse servo. What part is it?

I will look at my tranny manual and tell you what to do with it.

JH
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post #7 of 11 (permalink) Old 09-21-2003, 10:27 PM
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See the red sections I highlighted? I believe you just stick flat bladed screwdrivers there, pry inward on the snap ring to get it started, then just draw it out all the way around with screw drivers.

Josh Keady

1994 Super Coupe ('93 5.0L swap), 1990 Tbird 3.8L, 1982 Honda CB900F, 1972 F-100 SportCustom 4x4, 1970 Chevy Custom Camper / 20
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post #8 of 11 (permalink) Old 09-21-2003, 10:33 PM
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Small flathead works great, that way you're not gouging the metal.

-J

1991 Sport 5.0
4R70W Converted, U4P0/SCT Controlled
[email protected], 1.948 60' - 3450 lbs
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post #9 of 11 (permalink) Old 09-21-2003, 11:01 PM
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Also, you might have to press that cover down to take enough pressure off the ring before you take it out. Get someone strong to push down on it, or use a large wood clamp to press it in.

Josh Keady

1994 Super Coupe ('93 5.0L swap), 1990 Tbird 3.8L, 1982 Honda CB900F, 1972 F-100 SportCustom 4x4, 1970 Chevy Custom Camper / 20
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post #10 of 11 (permalink) Old 09-22-2003, 11:59 PM
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if you are having problems getting that off, you may not want to take the trans apart

no seriously, I just did one of these last night. You CAREFULLY pry back on one end of the right with a flat screw driver and go around in a circle. Once you get half way around get the heck out of the way.

Brian
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post #11 of 11 (permalink) Old 09-24-2003, 10:59 AM
 
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If anyone is planning on using the tranny, you don't want to round off the snapring slot by failing to relieve the piston pressure on the ring. A simple metal bridge bolted to the case, with a nut and bolt in the middle to push the piston into the bore works easily. In the car, everyone seems to prefer the bottle jack.
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