4R70W - a few rebuild questions - TCCoA Forums
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post #1 of 3 (permalink) Old 06-06-2017, 07:36 AM Thread Starter
Join Date: Nov 2015
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4R70W - a few rebuild questions

Hello guys!
I have to rebuild my 4R70W. Last time I replaced only a few parts and it fixed it's 1-2 shift problem, but not long after a 2-3 shift problem appeared.
Now I want to do a full rebuild (well, as full as my budget allows to), I studied articles about 4R70Ws and I found most answers I've been looking for, but there are still several things I'm confused about.
I'll point them out for some clarity.

1. Overhaul Kit - does a kit like this one - Ford AODE 4R70W Transmission Gasket and Seal Overhaul Kit 1992-1995 - include every gasket and seal I will need? You know, I live in Poland and I have to order almost all parts in the USA, it means a high expense and long time for me (shiping and taxes), so I really want to avoid a situation where I will need to order one single seal separately and pay another 50$ in total for it, because it wasn't included in a kit.

2. Sure Cure Kit - I'm gonna rebuild my tranny using an AODE/4R70W Full Rebuild Tutorial by Transmission Bench found on youtube. An instructor really recommends using a Sure Cure Kit by Sonnax, but every one I'm finding is for 96 and up transmissions. I've somewhere read that for older ones I can use an AODE Sure Cure Kit with manufacturer part number: SC-AODE, like this one - https://www.amazon.com/Sonnax-SNX-SC...aode+sure+cure
Can anybody confirm this? Is this a proper kit for a 1995 4R70W?

3. Frictions - What is that yellow friction material on the reverse frictions here - https://www.globaltransmissionparts....ule-raybestos/ - and is this gonna be ok for a stock car? I'm sure it will stay stock for another year or even longer, it's just a daily car, so I don't need any high performance stuff, but I want to give my transmission everything it needs to work fine for a long time.
Grooved, high energy frictions for a direct and an intermediate clutch, tan - stock ones for a forward clutch and I don't know what's for a reverse in this kit? Can I buy and istall this?

4. Steels - Are they reusable? My intermediate and direct steels have some blackened points, but they're still smooth and have no other signs of any other damage. Can I use those steels again or should I buy a new steels kit?

5. Intermediate One Way Clutch - Is a mechanical diode interchangeable with a roller clutch? Isn't it, right? If I wanted to upgrade my intermediate one way clutch, I'd buy a whole reverse cylinder assembly with a mechanical diode, right?
I'm afraid I can't afford it right now, although can I upgrade my 7-element roller to 14-element one? Will it fit?

6. Oil Cooler - I really want to install one since I don't have it yet. I won't have much money for a cooler after buying the whole rebuild stuff, but "even a crappy cooler is better that none", right? Can anybody tell me if this one - More Information for HAYDEN 676 - is gonna be ok? If it's not, could you check rockauto's coolers (I have some dicount there and I will order some parts there anyway) for a 1995 4.6 Thunderbird and tell me which one of these cheap ones will be the best for my car?
Here's a direct link - 1995 FORD THUNDERBIRD 4.6L V8 Oil Cooler | RockAuto

7. Overdrive Servo - I'm going to do a Jmod and I don't know which servo I'm supposed to use. "Building a Bullet Proof 4R70W" in your articles section says about using a 2.5 Servo in cars under 300HP, but Jmod instructions says about putting in a 2.7 Servo. So... 2.7?

I believe this is it. I will be very thankful for any answers, advices and tips since here in Poland I have noone to ask about 4R70W. I believe I can rebuild it corretly, just have to be sure which parts to use and it's gonna be ok. I hope

Thank you very much,
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post #2 of 3 (permalink) Old 06-06-2017, 05:23 PM
No, Mr. Lemmywinks, No!!!

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Join Date: Jun 2005
Location: Harriman, TN
Age: 56
Posts: 10,046
If you can find an 01 or 02 4R70W transmission from a Mustang Crown Victoria or Gran Marquis as a base to work from, it will have most of the upgrade parts, like the mechanical diode.

Since you have a 95, it's a bit more involved to swap than a rebuild, but it's substantially better.

I used sonnax parts in my rebuilds; they are good upgrades.

Use the non-cut teflon seals on the input shaft and the output shaft; you need sizing tools to use those.

There's a rebuild article here that's very detailed:


Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.

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post #3 of 3 (permalink) Old 06-07-2017, 02:13 AM Thread Starter
Join Date: Nov 2015
Posts: 15
The problem is that these transmissions are very rare in Poland. The only one I could purchase for this moment is a 1996 Tbird 4R70W and I bet it's 100% stock, so it's a little bit pointless to swap it. I could spend months or even years looking for a 01/02 one ;/
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