Drauka99
Full Access Member
- Joined
- Apr 24, 2023
- Posts
- 112
- Reaction score
- 353
- Location
- Northwest Florida, USA
- First Name
- David
- Truck Year
- 1981
- Truck Model
- C-10
- Engine Size
- 6.0 LQ4
Figured I would Post my project.
Background, I swapped in a 6.0 LQ4 into my 81 C-10. It had a 305 with a MY-6 3 speed with Overdrive manual behind it.
On the engine swap I kept the stock SBC engine placement with adapters and the manual clutch linkage. I used a Sachs NFW 1050 flywheel and a Sachs K187702 Clutch and pressure plate. I can not recommend this combination since my clutch went bye-bye after about 1 year of sporadic use. Measuring the carnage after pulling the trans I would say go with the Sachs NFW 1050 with a LUK 04902 RepSet. the Sachs clutch kit was 11" diameter and the LUK is 12" diameter, looking at the flywheel after removal, I wasn't getting much clutch contact to the flywheel, a good bit of the inner diameter of the clutch disk never touched the flywheel. That said there could have been several other reasons for early failure but that's my take.
Now I am swapping in a NV3500 out of a 89-93 C1500 (the S-10 versions are different and later models are different too, so I am trying to be specific).
Current parts List
Sachs NFW 1050 Flywheel (w/ ARP Flywheel bolts)
LUK RepSet 04-205 (w/ ARP pressure plate bolts)
Timken 614083 Throw Out Bearing
Dorman CS37815 Slave Cylinder
LUK LMC134 Clutch Master Cylinder
m12x1.0 to 3AN adapter fittings (straight fittings look like the will work but I also picked up a elbow adapter)
60" of AN3 braided brake line hose
Transmission Slip Yoke 3-3-5551X
The good so far. The MY6 and the NV3500 measure out to be the same overall length
The not so good so far.
The shifter for the Nv3500 is about 5" towards the engine than the MY6 and the MY6 shifter is offset about 3-4". I should be fine, from looking at other NV3500 swaps, for shifter space.
The 2wd MY6 is 27 spline (I think I did not count) output shaft. the NV3500 (see above about my specific make) has a 32 spline output shaft. The transmission mount is also about 7" rear of the one for the MY6. I have a 32 spline slip yoke ordered. I should be able to reuse the driveshaft I have with a adapter u-joint. I will verify but the caps currently look like 1310 Series and the 32 spline yoke is 1350 Series. If so a MOOG 348 should work. I have the transmission mount for the NV3500 ordered, the cross brace I can move back on the frame and drill new holes, I may have to make a spacer for the mount as well
Background, I swapped in a 6.0 LQ4 into my 81 C-10. It had a 305 with a MY-6 3 speed with Overdrive manual behind it.
On the engine swap I kept the stock SBC engine placement with adapters and the manual clutch linkage. I used a Sachs NFW 1050 flywheel and a Sachs K187702 Clutch and pressure plate. I can not recommend this combination since my clutch went bye-bye after about 1 year of sporadic use. Measuring the carnage after pulling the trans I would say go with the Sachs NFW 1050 with a LUK 04902 RepSet. the Sachs clutch kit was 11" diameter and the LUK is 12" diameter, looking at the flywheel after removal, I wasn't getting much clutch contact to the flywheel, a good bit of the inner diameter of the clutch disk never touched the flywheel. That said there could have been several other reasons for early failure but that's my take.
Now I am swapping in a NV3500 out of a 89-93 C1500 (the S-10 versions are different and later models are different too, so I am trying to be specific).
Current parts List
Sachs NFW 1050 Flywheel (w/ ARP Flywheel bolts)
LUK RepSet 04-205 (w/ ARP pressure plate bolts)
Timken 614083 Throw Out Bearing
Dorman CS37815 Slave Cylinder
LUK LMC134 Clutch Master Cylinder
m12x1.0 to 3AN adapter fittings (straight fittings look like the will work but I also picked up a elbow adapter)
60" of AN3 braided brake line hose
Transmission Slip Yoke 3-3-5551X
The good so far. The MY6 and the NV3500 measure out to be the same overall length
The not so good so far.
The shifter for the Nv3500 is about 5" towards the engine than the MY6 and the MY6 shifter is offset about 3-4". I should be fine, from looking at other NV3500 swaps, for shifter space.
The 2wd MY6 is 27 spline (I think I did not count) output shaft. the NV3500 (see above about my specific make) has a 32 spline output shaft. The transmission mount is also about 7" rear of the one for the MY6. I have a 32 spline slip yoke ordered. I should be able to reuse the driveshaft I have with a adapter u-joint. I will verify but the caps currently look like 1310 Series and the 32 spline yoke is 1350 Series. If so a MOOG 348 should work. I have the transmission mount for the NV3500 ordered, the cross brace I can move back on the frame and drill new holes, I may have to make a spacer for the mount as well
