T56 casting numbers
Thread Starter
Teching In
Joined: Jan 2005
Posts: 9
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From: Texas
T56 casting numbers I am looking for a 94-97 T56 for my LT1. What numbers am I looking for on the case to tell which trans it is (year, style, application)? What else might I look for? I am going to the swap meets and salvage yards looking and I need to be prepared.
You should look for the part number tag. A metal tag that is under one of the rear extension to main case bolts.Any casting numbers( cast-in the part) will not help you. Look for:
1386-000-006 -only good for 350 ft-lb and has a 3.36 1st ratio
1386-000-007- 2.97 1st ratio/350 ft-lb ,maybe more
1386-000-009-2.66 1st ratio 400ft-lb
1386-000-017- 2.66 ratio/ 400 ft-lb
Its a crap shoot getting a take-out box. "worked perfrctly" can't be demonstrated/ tested without an install. I would plan to go through anything I bought before I installed it= and add ( at least) new blocker rings and an iron 3/4 shift fork.
1386-000-006 -only good for 350 ft-lb and has a 3.36 1st ratio
1386-000-007- 2.97 1st ratio/350 ft-lb ,maybe more
1386-000-009-2.66 1st ratio 400ft-lb
1386-000-017- 2.66 ratio/ 400 ft-lb
Its a crap shoot getting a take-out box. "worked perfrctly" can't be demonstrated/ tested without an install. I would plan to go through anything I bought before I installed it= and add ( at least) new blocker rings and an iron 3/4 shift fork.
