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Old 05-09-2006, 11:36 AM
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700-R4 Transmission rebuild or T56 swap?

I'm getting ready to do a tranny rebuild on my 1985 Caprice Classic wagon. I need to know if this is what is needed. It has 192,000 miles and is started slipping when I punched the gas in 2nd gear at about 30 mph. Maybe it could have been that it wasn't warmed up completely (turned key and drove)?

Well, its been making little whining noises so I want to do the rebuild anyways. What I want to know is do I need a new torque converter? If so, what will provide the most power to my wheels? Brand name? Everything you can recommend for my wagon.

I've come down to picking out an Alto "Red Eagles" clutch power pack w/ the hi-perf. "Red Eagles" frictions and Kolene Steels.

I'm also looking for a different set that has just everything else I'm looking for, gaskets, seals, etc.

Or I could do my T56 swap

Let me know what you think.

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Old 05-09-2006, 12:22 PM
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I'm about to do a T56 swap in a 96 impala SS. Not cheap, not easy, but worth it in my opinion. If you want to do it, you might be surprised at how things bolt up nicely. Modify some F-body pedals, use F-body hydraulics, and have fun. You may need to massage your trans tunnel for the reverse lockout solenoid but its not much massaging. You'll need a crossmember fabricated, or your current one modified. You'll need a new driveshaft that's balanced for 8000 rpm because the T56 is a very high ratio box. First is 2.66:1 and double OD is 0.5:1. I'm going from 3.08s behind my 4L60E to 4.10s behind the T56 and my final drive ratio will be the same. Expect your older B-body to have 2.73 gears or similar, so a gear swap will be an absolute necessity.

Depending on your skills and how much you do yourself, expect anywhere from $2000 to $6000 for the swap and that's with well-used parts. A new tranny is much more.
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Old 05-10-2006, 07:24 AM
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Quote:
Originally Posted by curtis73
I'm about to do a T56 swap in a 96 impala SS. Not cheap, not easy, but worth it in my opinion. If you want to do it, you might be surprised at how things bolt up nicely. Modify some F-body pedals, use F-body hydraulics, and have fun. You may need to massage your trans tunnel for the reverse lockout solenoid but its not much massaging. You'll need a crossmember fabricated, or your current one modified. You'll need a new driveshaft that's balanced for 8000 rpm because the T56 is a very high ratio box. First is 2.66:1 and double OD is 0.5:1. I'm going from 3.08s behind my 4L60E to 4.10s behind the T56 and my final drive ratio will be the same. Expect your older B-body to have 2.73 gears or similar, so a gear swap will be an absolute necessity.

Depending on your skills and how much you do yourself, expect anywhere from $2000 to $6000 for the swap and that's with well-used parts. A new tranny is much more.
My Camaro friend told me that I can get a kit with everything I need for $1,800. Sounds like a deal to me.

Yes, I'm very excited that it will bolt right up but what I don't want is a hydraulic clutch. It just seems to be too much to stay on top of if I lose the pressure. If I'm not mistaken, the earliest T56 from the '93 Camaro has a direct linkage to the fork. I'm very interested in bolting that up. Plus, I want the '93 transmission because it has 2.73 gearing like my Caprice wagon. So then I can get the clutch/brake pedal assy. and get a custom made driveshaft. I wonder if I can find anyone interested in trading my recent freebie for a '93 T56 'Maro. Then again, that's wishful thinking.
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