Automatic Transmission Specialists

Subtitle

 

6-speed (VE-6L80e) conversion to 4-speed (4L80e)

This conversion replaces the 6-speed transmission with a 4-speed transmission.

The 4L80e offers superior performance; is stronger & can withstand increased engine power - up to 1200hp.

The 4L80e (or 4L85e) transmission is found in all 3/4 & 1 ton Chevrolet trucks from 92 - date; including the Chevy Silverado & the Suburban 1500 & 2500 series.  Also the GMC Yukon XL (the rebranded Suburban).

LS style is required as it bolts to an LS engine.  The earlier 4L80e bolt pattern is slightly different.

Gear ratio camparison table:

 

6L80e

 

4L80e

 

4L60e
 1st gear ratio

4.027

2.48
3.059
 2nd gear ratio

2.264

1.48
1.625
 3rd gear ratio

1.532

1.00
1.00
 4th gear ratio
1.152
 .75
0.696
 5th gear ratio
0.852
 
 6th gear ratio
0.667
 
 
 Reverse gear ratio
3.064
 2.08
 2.29
 
 
 
 







4L80e transmission fitted to a VE SS 427 ute.







As the mount is modified, there is no need to change or modiy the exhaust system.


(Picture 1 of 2)







(Picture 2 of 2)






The LS style cover plate is required.






There is minimal height difference between the 6L80e & the 4L80e in under vehicle clearance.