for those of you with shift kits and jmodded trannies - TCCoA Forums
 
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post #1 of 15 (permalink) Old 01-08-2004, 07:11 PM Thread Starter
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for those of you with shift kits and jmodded trannies

have any of you guys added a shift kit/did a jmod with close to or over 100k miles without ever changing the tranny fluid? im about to add a shift kit to mine, but i was concerned that i would run into problems since i have never changed my fluid before when i have over 100k miles. for the record, i havent had any tranny problems. will fluid this old create any varnish or cause old fluid to be clumped to parts inside the tranny?

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post #2 of 15 (permalink) Old 01-08-2004, 07:24 PM
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i should have done mine more often but i had like 99500 miles on mine when i did the jmod. its fine now 30000 miles on it. gonna do the fluid change within the next few weeks.

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post #3 of 15 (permalink) Old 01-08-2004, 07:47 PM
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Did the J-Mod at 140,000 miles. Only had the fluid changed twice before that, at the 50,000 and 110,00 mile mark.

Switched to Mercon V at the 140,000 mile mark.

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post #4 of 15 (permalink) Old 01-09-2004, 11:37 AM Thread Starter
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i guess im kind of concerned that fluid this old would be fused to parts, making it hard to take out springs and retainers and whatnot. anyone experience this?

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post #5 of 15 (permalink) Old 01-09-2004, 12:51 PM
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No but going forward be nice to your trans and give it fresh mercon every 15-20K

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post #6 of 15 (permalink) Old 01-09-2004, 02:34 PM
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My tranny fluid had only been changed once, to my knowledge. Once you get those snap rings out, you better move the hell out of the way good and quick. There's no way in the world those things are gunna stick. The 1-2 and 2-3 pistons literally shot out of their bores.

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post #7 of 15 (permalink) Old 01-11-2004, 02:50 AM
 
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I jmodded mine at ~120,000 on the clock. I know for a fact that the fluid had been change at least once before, and I bought the car at ~80,000 miles. I'm not sure if it was merc V or not, but thus far I've not had problems with my tranny. And mine was running fine at 120,000 with no jmod
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post #8 of 15 (permalink) Old 01-14-2004, 06:07 PM
 
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Engine replaced at 88,930 Jmod at 90,000 with a cooler and merc v. no problems and best of all no more shudder!!! BTW I have no clue if the fluid was ever changed before I did it at 78,000. Be sure to use merc v, not dex 3.
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post #9 of 15 (permalink) Old 01-15-2004, 01:33 PM
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I heard someone say not to use Mercon V in the AOD. Not sure which you should use but that's what I read.
-Thomas

1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner

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post #10 of 15 (permalink) Old 01-15-2004, 03:30 PM
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The seals are the same in both trannies, contrary to all the stories the tranny shops tell you. I believe its Page 5 of Jerry's article states its safe and proper to use Mercon V. It's in there.

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post #11 of 15 (permalink) Old 01-16-2004, 12:58 PM
 
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The more recent tsb's also say mercv, I have it here somewhere, here found it won't post the entire tsb, but here's the note.
NOTE
FLUIDS LABELED MERCONV ARE
RECOMMENDED FOR SERVICING 1992 AND
BEYOND AODE/4R70W TRANSMISSIONS WHICH
ORIGINALLY SPECIFIED MERCON. SERVICE
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post #12 of 15 (permalink) Old 01-17-2004, 02:16 AM
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Quote:
Originally posted by thndrchiken
The more recent tsb's also say mercv, I have it here somewhere, here found it won't post the entire tsb, but here's the note.
NOTE
FLUIDS LABELED MERCONV ARE
RECOMMENDED FOR SERVICING 1992 AND
BEYOND AODE/4R70W TRANSMISSIONS WHICH
ORIGINALLY SPECIFIED MERCON. SERVICE
But that does not include the AOD. Those two transmissions listed are the electronic overdrives.

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post #13 of 15 (permalink) Old 01-17-2004, 12:00 PM
 
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That's correct, the TSB only applies to the electronic overdrive trannies. To my knowledge the AOD's didn't suffer from the same problems.
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post #14 of 15 (permalink) Old 01-17-2004, 12:44 PM
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Problems or not, the man who helped design the transmission recommends it. His word is kinda hard to beat in this situation.

96 Mustang GT 5spd. w/ 248A Option (GTS). Stock for now until I get the Roush on.

97 Thunderbird 4.6L LX /w Sport Package
24k B&M Cooler, 1" lowered, Steeda UD Pulleys, Dynomax cat-back, J-mod, 3.73's, PI intake, PI cams, 03 GT MAF/Tube, SCT tuned - Gone but not forgotten.
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post #15 of 15 (permalink) Old 01-17-2004, 02:15 PM
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Quote:
Originally posted by Silver95Bird
Problems or not, the man who helped design the transmission recommends it. His word is kinda hard to beat in this situation.
yup you're right.

1988 Notch Mustang: - 438W, direct port n2o, t56
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