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post #1 of 18 (permalink) Old 09-19-2011, 01:37 PM Thread Starter
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slow 3 to 4 shift.

I bought Jeffbird95's old LX. 01 mustang tranny, 3800 stall, j-mod.

Its having some shift problems between the 3 to 4 shift. everything else works like it should, every other shift is strong and firm.

At WOT it takes a few secs to shift and the car does hit the rev limit, then shifts.

Just crusing, i feel it start to shift, the rpms go up a little, then it they slowly goin down as it shifts. weird.

Im goin to get a some videos of how the car acts tomorrow.

Im goin to pull the pan sometime this week and wanted to know where the 3 to 4 shift accumlator/spring was?
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post #2 of 18 (permalink) Old 09-19-2011, 02:01 PM
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NEVER shift 3-4 at WOT

There isn't an accumulator, just a servo to apply the band, most of it sounds tune related in an effort to prevent WOT OD shifts

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post #3 of 18 (permalink) Old 09-20-2011, 04:22 AM
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Question

So WOT & in some other modes when it's coming out of 3rd into OD it FLARES - Right ?

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post #4 of 18 (permalink) Old 09-20-2011, 07:09 AM
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Quote:
Originally Posted by XR7-4.6 View Post
NEVER shift 3-4 at WOT

There isn't an accumulator, just a servo to apply the band, most of it sounds tune related in an effort to prevent WOT OD shifts
+1. A WOT 3-4 can and will break the stub shaft.

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post #5 of 18 (permalink) Old 09-20-2011, 08:39 PM
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Quote:
Originally Posted by theterminator93 View Post
+1. A WOT 3-4 can and will break the stub shaft.
The truly creative ones have broken that shaft into three pieces, lol.

Alan posed a pic awhile back of a drum the shaft turned in as it broke, iirc.



When the 3-4 shift happens, it's in 2nd and 4th at the same time for the amount of overlap time in the release time of one clutch, and the apply time of the band.

If it applies before it releases, it breaks something.

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post #6 of 18 (permalink) Old 09-20-2011, 09:00 PM
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Yeah don't do that anymore, Justin.
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post #7 of 18 (permalink) Old 09-21-2011, 09:27 AM
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But this aint WOT :

Quote:
Originally Posted by Stuckinkaos07 View Post
Just crusing, i feel it start to shift, the rpms go up a little, then it they slowly goin down as it shifts. weird.?

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post #8 of 18 (permalink) Old 09-21-2011, 07:33 PM
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Sounds just like what mine does on the 2-3 shift.

Since 4th doesn't have an accumulator, possibly poor adjustment of the 4th gear band?
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post #9 of 18 (permalink) Old 09-22-2011, 06:52 AM
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Quote:
Originally Posted by alec_b View Post
Sounds just like what mine does on the 2-3 shif
Have you still got the Spring in your 2-3 Accumulator?

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post #10 of 18 (permalink) Old 09-26-2011, 08:02 AM Thread Starter
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Thanks guys for all the input, ill see if I can't get a video uploaded sometime today.
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post #11 of 18 (permalink) Old 09-30-2011, 01:12 PM
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3-4 shift is different on the later trannys, unless you adapt the tune a bit.

If it was tuned a long time ago, it may not be correct.

Without my tune, my tranny would just about hit a neutral 3-4 in a 25mph zone, with no or little throttle.

It felt like I was going to do a neutral drop when I hit the gas again...

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.
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post #12 of 18 (permalink) Old 10-01-2011, 08:57 AM Thread Starter
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Quote:
Originally Posted by Grog6 View Post
3-4 shift is different on the later trannys, unless you adapt the tune a bit.

If it was tuned a long time ago, it may not be correct.

Without my tune, my tranny would just about hit a neutral 3-4 in a 25mph zone, with no or little throttle.

It felt like I was going to do a neutral drop when I hit the gas again...
it could very well be my tune.

is there anyway i could change this with my X-cal 3?
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post #13 of 18 (permalink) Old 10-01-2011, 11:27 AM
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I'm not sure.

The tune I got from Lonnie has the corrections; as do the tunes I wrote with my PRP.

Most of the correction is in the updated SCT transmission value file; I changed a lot of things by hand, but not the pressures.

I don't know what value files are on an xcal3; you need the one for a newer tranny.

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 #14 of 18 (permalink) Old 12-25-2011, 10:15 PM
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i have this same problem, it was only doing right at 40 mph with slight flare then shift to od. this past week it has gone from 1-200 rpm flare to 1000-1500 rpm flare and hit hard into 4th. i was thinking of changing filter, fluid, and dropping vb to see any broken springs or scarred cylinders/accumulaters. any other ideas?

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post #15 of 18 (permalink) Old 12-26-2011, 09:59 AM
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Originally Posted by ITT-BIRD View Post
any other ideas?
First idea that comes to my mind is a poor 95 Main VB needed a LOT more than just a JMOD to keep a good TC alive- See:

http://www.sonnax.com/

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post #16 of 18 (permalink) Old 12-27-2011, 01:09 PM
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Originally Posted by BUCK View Post
First idea that comes to my mind is a poor 95 Main VB needed a LOT more than just a JMOD to keep a good TC alive- See:

http://www.sonnax.com/
so you are suggesting that the pressure vavle regulator and boost sleeve kit?

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post #17 of 18 (permalink) Old 12-27-2011, 02:02 PM
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I get the same with my truck....97f150 4r70w, 4x4, 4.6L.
cruising, and when its time to change gears the rpms jump way up, then clunks/slams into gear.

since its not a 95, what would be a solution to my fix?
I recently changed fluid(mercon5), and filter....didn't help.

truck is stock with a stock tune....no j-mod.
116,000 miles.

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post #18 of 18 (permalink) Old 12-27-2011, 03:50 PM
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Quote:
Originally Posted by ITT-BIRD View Post
so you are suggesting that the pressure vavle regulator and boost sleeve kit?
Originally I was going with a 2001 VB on my Rebulit 96 Tranny but the 2001 Main VB Casting was scored so I scavenged it for parts & did the below on my 96 Main VB with excellent results:

Sonnax Main Regulator Valve (black) & the shorter stiffer Spring fm 2001 Main VB.

O Ringed End Cap fm 2001 Main VB in 2-3 Shift Valve.

Sonnax Solenoid Pressure Regulator (black) Valve from 2001 VB but used the heavier 96 Spring vice the TEENY Sonnax Spring from the 2001 VB... & by teeny I mean it slipped over the small tit on the PR Valve vice bearing on the flat "lands" like all the other Springs do in the like PR Valves of both VB's

Stayed with Jerry's desired Orange (or Brown) Spring in Converter Clutch Servo & 0D Servo as the 96 Main VB already had both - (2001 main VB had longer lighter CC Spring with entirely different OD Servo Assy & 2001 Sep Plate has Feed Hole for it, etc...)

Mild JMOD settings on 96 Sep Plate in keeping w/ my stock Motor.

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