will a 6sp bolt up to a 12valve

 

well first im assuming your talking about a 6 spd manual tranny, and yes it should bolt up to the engine, now the t-case im not sure on...and you will also have to get your driveshafts re cut because the 6 spd is alot bigger than a 5 spd

 

You need a 6speed flywheel and clutch also.

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Front shaft will have to be lengthened and the rear shortened.

 

https://www.dieselbombers.com/5-9l-1...-12-valve.html

 

My son put a a late model 6 speed (G56) manual in his 95. Needed to modify the drive shafts. Also need new flywheel clutch, pressure plate. He bought the whole clutch setup from South Bend. Also need a wide cross member which has to be modified (lowered) to accommodate the size of the six speed. I think he also had to bend the shifter lever some.

 

Transfer case inputs are 29 spline on both the 5-speed and 6-speed(5600 don't know about the G56) the Automatic is 23 spline.

 

Did one in mine it's sweet u need crossmember, flywheel, clutch, i used the factory 6 speed shifter u might need to trim the floor a bit though