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Transmissions and Drivetrain Need help with your trans? Problems with your axle?

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Old 09-27-2009, 07:16 PM   #1
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Join Date: Dec 2006
Location: Vernon CT
Posts: 171
Car: 88 IROC-Z
Engine: 383
Transmission: T56
Axle/Gears: 4th gen 3.42posi

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T56 pops out of reverse

Since I installed my used T56 from a 97' it allways pops out of reverse and grinds. It never seems to engage too much. I can get it to stick enough to get out the driveway. I did not hook up my reverse lock out switch.
The guy I bought it from sayed it did it before too
only dose it in reverse, no other gears
any ideas? common prob?
Im pretty mecanical but trannys are kind of unnerving to me so if its pretty easy maby I could DIY.
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Old 09-27-2009, 07:18 PM   #2
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Car: 86 Iroc
Engine: 383
Transmission: TH350
Axle/Gears: 3:73s!

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Re: T56 pops out of reverse

replace the reverse sycro assembly. Its easy to do.
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Engine:
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Transmission:
Rockland gear T56, Ram aluminium flywheel, SPEC Stage 2+ clutch, GM slave and master.
Rear End:
3:73's, other then that stock until she blows.

Other Mods:
Energy Suspension bushings, Hotchkis SFC, Hotchkis rear LCAs, Front vented rotors, New Ball Joints, New Tie-Rods, New Center Link, New Idler Arm, All Brakes are new, Struts/Shocks. Big Block Fiberglass Hood. Griffen 19X31 Radiator W/ custom shoud. Spohn Trans Crossmember with Adjustable Torque Arm, Spohn Driveshaft. 4th Gen leather Seats. M/T ET street tires....
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Old 09-27-2009, 08:57 PM   #3
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Car: my 1983 Z28 and my 2006 honda vtx 1
Engine: 355 sbc hyd roller cam dart heads
Transmission: t-5 for now
Axle/Gears: built 10 bolt with 3.73s

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Re: T56 pops out of reverse

what he said
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Sbc 355,dart iron eagle platinum heads, comp cams nx276 hyd roller camshaft, master power t76 .96 a/r turbo,CSU 750 cfm blow thru carburetor, TKO 600 , inland empire drive shaft,3.73s with tons of other mods!!!!!!!!!
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Old 09-27-2009, 09:13 PM   #4
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Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70

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Send a message via AIM to InfernalVortex
Re: T56 pops out of reverse

I thought manuals didnt normally have synchros on reverse?
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Old 09-28-2009, 07:42 AM   #5
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Join Date: Aug 1999
Location: Elkton MD, USA
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Car: 1985 Camaro Z28, VIN F
Engine: 427 sbc, HSR
Transmission: T-56, self rebuilt 700+ hp
Axle/Gears: Moser 12bolt, 3.42 trutrac

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Re: T56 pops out of reverse

The T56 has a bronze synchro on Rev. It wears quickly and most T56's need Rev rebuilt as a result. I like putting a carbon fiber synchro on reverse when I can, really helps a rebuild last longer than normal.
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Old 09-29-2009, 05:51 PM   #6
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Car: 88 IROC-Z
Engine: 383
Transmission: T56
Axle/Gears: 4th gen 3.42posi

Classifieds Rating: (2)
Re: T56 pops out of reverse

Anyone have a part # or instructions on exactly how to do this?
I also heard T56s have a weak 3-4 shift fork should I replace that too while im in there? maby some kind of rebuild kit? Id prefer to only tear in to her once.
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Old 09-29-2009, 09:50 PM   #7
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Location: Elkton MD, USA
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Car: 1985 Camaro Z28, VIN F
Engine: 427 sbc, HSR
Transmission: T-56, self rebuilt 700+ hp
Axle/Gears: Moser 12bolt, 3.42 trutrac

Classifieds Rating: (2)
Re: T56 pops out of reverse

checkout thegearbox.org in their T56 section.. They have the 3,4 steel fork, the bronze fork pad set, billet keys for 1,2 and 3,4 (5,6 too if your able), a complete carbon-fibre blocker ring set. There are a few T56 rebuild websites/links if you're going to DIY. Check out ls1tech.com for a few and google will turn up a bunch. Reverse uses the same size blocker ring as 3,4 (I'm pretty sure, I can double check and get back if you're interested). The kit will have the bronze one.
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Old 10-01-2009, 08:34 AM   #8
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Car: 1989 Turbo Trans Am
Engine: 383 pt88
Transmission: built 700r4
Axle/Gears: 9 bolt 3.45s

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Re: T56 pops out of reverse

sweet so i just learned whats wrong with my t56.

here is a great website for t56 parts. ive bought from these guys before and their customer service is great!
http://www.autogear.net/warnergearT56_106.htm
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Old 10-01-2009, 08:34 AM
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