what year is that step-van ?

 

10.5 damnit......ohwell

here are the stats regarding torque

# 10.5” 14 bolt full floating rear differential has a torque rating 6,242 ft·lbf
# 11.5” 14 bolt full floating rear differential has a torque rating 8,321 ft·lbf

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87'

 

i'd check the glove compartment of the step-van and see if it has a G80 RPO code...

that can be bad.... and good...

 

I can't check the glove box anymore.......

(body is gone.... didn't keep anything except teh vin and body ID tags.....

VIN Code: 1GB
Assembly Country: UNITED STATES
Make: Chevrolet
Body Style: Incomplete (Strip Chassis)
Restraint System Type (Passenger Cars) or Brake Type and GVWR Class (Trucks and Vans) - 4th Position
VIN Code: H
Brake System: UNKNOWN
GVWR Class:
GVWR Range: 6,001 - 10,000 Pounds
Line,Series Body Type - 5th, 6th, 7th Positions
VIN Code: P32
Vehicle Line: P30
Vehicle Type: Truck
Engine Type - 8th Position
VIN Code: J
Engine: 6.2 L
Cylinders: 8
Fuel: Diesel
Engine Manufacturer: GENERAL MOTORS
Model Year - 10th Position
VIN Code: H
Model Year: 1987
Assembly Plant - 11th Position
VIN Code: 3
Assembly Plant: DETROIT, MICHIGAN
Wheel Axles Wheelbase 282.0"

 

hope it has a G80, that's the locking diff....

it has it's downsides though.... they have the tendency to go grenade on you if you have too much torque.... but that can be easily fixed with another kind of LSD...

 

Say hello to the new 1947 transmission...... 10 speed RT6610!

 

How are you going to mate that tranny to your 6BT????? I was under the impression those big trannys like that had SAE #1 bellhousings, and the largest bellhousing adapter you could get for a 6bt is a SAE #2. You gotta let me in on this, I want to put one of these in my project truck. I have a eaton FS 6 speed tranny bolted on right now, working on a clutch setup. Would love to go with a big truck tranny though!

 

Just curious, how much did that 10 speed set you back? How many miles are on it?

 

looks like sae 3 the parts list for this truck is reading like the menu at my favourite resturaunt-superb.
if that is sae 3 then it should go straight into the 6bt,possibly just a simple spacer to back the input shaft away from the motor bell?
cool project.

 

Sae 3 is smaller than 2 and 1. That should be a Sae 1 on that semi tranny.