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post #1 of 5 (permalink) Old 02-13-2011, 08:36 PM Thread Starter
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J-mod/Trans problem

My brother asked me to do the j-mod to his 98 Mustang GT. He's having a problem now the car shifts great, however he does need to rev it up slightly before it engages fully. We used the separator plate gaskets needed (P.N's xw7z-7d100-aa) Ford says they no longer make the f7az part number. I drilled out the holes to spec,took out the lower 1-2 accumulator spring but did not get the updated accumulator and filled the transmission with Mercon V.

While in first manually it is really sluggish but does not slip and when it hits second it pulls like it should. In first its really tight if he lets it rev up to 3k and idle down it decelerates rather quick. Any idea's on this?

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post #2 of 5 (permalink) Old 02-14-2011, 12:00 AM
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Question

Kinda finding it hard to believe a 98 did not already have the updated 1-2 Accumulator so ______?

What's the prob_____?

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post #3 of 5 (permalink) Old 02-14-2011, 12:50 AM Thread Starter
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Originally Posted by BUCK View Post
Kinda finding it hard to believe a 98 did not already have the updated 1-2 Accumulator so ______?

What's the prob_____?
Sorry what I meant was we did not replace it. As far as the problem, the transmission is acting as if it does not have enough transmission fluid flow. The problem is the dip stick reads full when hot and cold.

Daily Driver - 2014 Ford Mustang GT 5.0 manual black on black. Stock for now.

Current Project - 1996 T-bird LX 4.6L: PI head swap, factory 3.27 TL, tuned by Don LaSota.

Retired Car - 1995 T-bird LX 4.6L: 4v swap plus Cobra goodies
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post #4 of 5 (permalink) Old 02-14-2011, 02:03 PM
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Originally Posted by stay_unique_91 View Post
Sorry what I meant was we did not replace it. As far as the problem, the transmission is acting as if it does not have enough transmission fluid flow. The problem is the dip stick reads full when hot and cold.
Sounds like low fluid ... or the filter maybe came off ??
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post #5 of 5 (permalink) Old 02-14-2011, 02:05 PM Thread Starter
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Originally Posted by SCTbird1994 View Post
Sounds like low fluid ... or the filter maybe came off ??
Well it has plenty of ATF and second and third gears feel great.

Daily Driver - 2014 Ford Mustang GT 5.0 manual black on black. Stock for now.

Current Project - 1996 T-bird LX 4.6L: PI head swap, factory 3.27 TL, tuned by Don LaSota.

Retired Car - 1995 T-bird LX 4.6L: 4v swap plus Cobra goodies
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