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When did your 4R70W fail?

  • 0 to 50k miles

    Votes: 16 3.6%
  • 50k to 75k miles

    Votes: 24 5.4%
  • 75k to 100k miles

    Votes: 53 12.0%
  • 100k to 125k miles

    Votes: 40 9.1%
  • 125k to 150k miles

    Votes: 24 5.4%
  • 150k plus miles

    Votes: 13 2.9%
  • Hasn't Failed, above 50K

    Votes: 79 17.9%
  • Hasn't Failed, above 100K

    Votes: 132 29.9%
  • Hasn't Failed, above 150K

    Votes: 43 9.8%
  • Hasn't Failed, above 200K

    Votes: 17 3.9%

  • Total voters
    441
1 - 20 of 175 Posts

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Discussion Starter #1 (Edited)
I have 102k miles on my Tbird now, radiator guy got water in the tranny cooler and caused the shudder. I have since flushed the tranny twice and added a seperate cooler, bypassing the one in the radiator. Now I only have a mild shudder in 3rd gear around 35 mph.

Anyway, I figure if my tranny is doomed to fail before too long anyways, I'll just leave it be until the tranny does fail. Then it will be a 98+ GT tranny.

Just wondering when everyone else's tranny failed (if it has yet). Thanks.
 

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488 Posts
I'm on my second one now and that ones slipping like crazy now :redmad: Saving now for a road trip to FL. to get a Reinhart (SP?)tranny and drive shaft.this is how it should have been done in the first place.But live and learn.:(
 

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Premium Member
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3,247 Posts
I'm at 179,500 miles, and the tranny is all original, and never been rebuilt.

Whoops, I take that back, the MLPS has been replaced.

Did the J-Mod (sep. plate, springs and accum's.) at around 130,000 and is still going strong.
 

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3,178 Posts
mine went at 92k due to a TC failure. I solved that problem according to the tech articles :)
 

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AED Specialist
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1,277 Posts
Factory issued...

I run the factory issued 4R70W with only Ford parts as upgrades.

75,000 miles and handles 380 HP and over 400 lb.-ft. of torque on a daily basis.

A-Train
 

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Johnny Five is Alive, TCCoAAC Member
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1,614 Posts
should edit poll..

add following:

Hasn't Failed, below 10K
Hasn't Failed, above 50K
Hasn't Failed, above 100K
Hasn't Failed, above 150K
Hasn't Failed, above 200K
 

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277 Posts
mine's running on 135k original miles: mild shudder, fixed with mercV, very light slippage lately.
 

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10 Posts
Although I now have a '97 XR7 with 77k and running strong, my previous auto was a '96 Lincoln Town used as a Limo. There was 304k on the original tranny when the car was stolen....still shifted like new...
 

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726 Posts
about 87000k, I think, but this was with mercon 3 and no external tranny cooler, so i basicly doomed it to fail. It was expensive to replace, but the dennis reinhart trans was worth it.
 

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391 Posts
WkStill said:
should edit poll..

add following:

Hasn't Failed, below 10K
Hasn't Failed, above 50K
Hasn't Failed, above 100K
Hasn't Failed, above 150K
Hasn't Failed, above 200K
Good idea, if a moderator sees this, please add!

<i>Edit: There is only 10 available fields for poll options.</i>
 

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89K right now, leaks, shudders, slips and misses.
And to think, allI di to this tranny was:
200 miles balls out road course
200+ 1/4mi pass
200+ waterbox burnouts
Countless freeway OD downshift pulls
doezens of drifts
6 reverse 180's
10+ miles at 145-150mph+
2 Auto X's
and I looked at it funny, once. :rolleyes:
 

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Johnny Five is Alive, TCCoAAC Member
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1,614 Posts
Haha.. I still don't qualify to vote..

less that 10K hehe... still going strong ..
 

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Mine JUST failed, at 108k and some change...

Never had the cooler or J-mod done. It did have the TC changed around 50k to fix shuddering... It just sat for about 2 years too, and I didnt change the fluid when I started driving again. :cbones:
 

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222 Posts
Guess I got the sorriest tranny ever then mine died about 45K miles then again about 65K miles and the last time @ 95K miles then I Decided Autos aren;t my thing and went 5-speed :) I guess running a power adder and numerous other things throug a reletively stick tranny is kinda a no-no heheheh :) Oh well It has all been very interesting and FUN to say the least :cool:
 

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Trumpeter Extraordinaire
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2,917 Posts
My car was at 188,000 when I experienced a 3-4 shift problem. Trans started to run hot, but it never 'failed' (as in I couldn't drive it). I opted for a rebuild, since there was a number of excessively worn parts (before I learned a bit about the trans itself, the J-mod, and the Reinhart Automotive 4R70W). I'm at 210,600+ now.
 

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mines still goin good at around 130k, it has a hard 1-2 and im goin to get a tranny cooler and the j-mod as soon as i can on it, or when a new engine comes a fully rebuilt performance one, of a jasper mustang gt auto.


p.s. not really whored at all just a few romp sesions here and there by my dad but nothing like blackbirdsport said ;)
 

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just found out from my dad we had shuttering around 50k miles and had a full pump and refill and then another one of those around 80k then ford told us to not change it again.....does anyone know why they would say something like that? is it cuase of knocking all the crude lose and blocking the holes and chocking the tranny?
 

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2,936 Posts
Mine has a little bit over 130k on it and the only thing that I have wrong is a 2-3 shudder when the tranny gets hot. Not to bad for a tranny that has seen a hard life.
 
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