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Thread: 4l60e help
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12-28-2016, 07:05 PM #1
4l60e help
I have a 1994 z28 the trans went out so I bought another from local shop .my transmission has 12 pins in the case the one I bought from the shop has 13 pins in the case will it work in my 94 ? This is the numbers off the one I bought 7chd255h is this a 1994 4l60e my tras mission numbers or 4ffd2. H .will it work or do I take it back?
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12-28-2016, 07:38 PM #2Xtreme Member
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Supporting MemberNo, it's a newer pwm style, the lock up won't work right and when it down shifts it'll go 4th neutral 2nd instead of 4th-2nd. @Cahall
Sent from my SAMSUNG-SM-G935A using Tapatalk2021 Charger Scat 392
1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot
The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!
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12-28-2016, 08:17 PM #3"The Rock"
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1996 Camaro Z28: RIP 09/25/2016
1994 Trans Am GT: SOLD 05/2017
1985/1996GS clone: SOLD
1996 Impala SS H/C, LT, with true dual exhaust, 4.10s, lowered, with CPT trans, many cosmetic mods, and a whole lot more to come...
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12-28-2016, 08:25 PM #4Xtreme Member
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Supporting Member2021 Charger Scat 392
1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot
The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!
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12-28-2016, 09:15 PM #5
No it will not work.
94 trans am forged 355, le 21* trickflows, le cam, a4 3800 stall
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12-28-2016, 10:11 PM #6LTXTech Sponsor
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Pull the pan on the trans you bought and see if it actually has a PWM solenoid. All aftermarket harnesses have 13 pins because they're universal. The PWM solenoid sticks out of the front of the valve body, on the passengers side. There will be a similar solenoid on the drivers side for 3-2 downshift. You can also look for the letters "PWM" cast in the front of the pump. If it has the letters "PWM" and/or the PWM solenoid, it won't work.
There's a "sticky" in the drivetrain section explaining the differences.
FrankGail C. Cahall
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12-28-2016, 10:57 PM #7"The Rock"
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Our BIG MOMENT @ the 2012 LTXshootout
http://www.facebook.com/photo.php?v=521756391174175
1996 Camaro Z28: RIP 09/25/2016
1994 Trans Am GT: SOLD 05/2017
1985/1996GS clone: SOLD
1996 Impala SS H/C, LT, with true dual exhaust, 4.10s, lowered, with CPT trans, many cosmetic mods, and a whole lot more to come...
2002 Caddilac EscaladeL CAI, lowered, 6.0 , AWD..
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12-29-2016, 06:08 AM #8
Thanks guys. The one I bought don't have pwm on the front of the pump . I looked up the numbers 7chd and it came out of a 1997 2500 van
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12-29-2016, 06:33 AM #9
So if don't have pwm stamped on the pump and don't have the solenoids it will work?
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12-29-2016, 09:36 AM #10LTXTech Sponsor
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You can't always go by the numbers on the case. 4L60E cases were interchangeable from 1993-1997. The case and internal wiring harness may have both been swapped. If the pump doesn't have the "PWM" stamped in it, it's definitely a non PWM pump. I would just check and confirm on the solenoid. Pull the pan and take a couple pictures and post them. I'll let you know what you have.
FrankGail C. Cahall
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