The 700R4 can be built to shift without electric/electronic control - that's what I did for my 6.2L diesel. Still, the 700 would require a throttle-valve (TV) cable and bracket. A 4L80-E would require a TCM, harness, engine speed sensor and TPS (figure about $1k beyond the cost of the trans).
If on a tight budget, and if you wanted to use a TH400, you could post an ad in the classified ad section for a VRV/vac pump. Buying used would be less expensive than new.
Jim
Jim:
What method did you use for locking up the 700? When I was building the Buick, the only thing that was available would only give me lock up in fourth. As I tow with the car, it is important that I have lock up in third. Currently use a switch on the dash that does work but would love to find a way to do it without having to remember to work the switch.
Bill
91 Buick Roadmaster/Avant 6.2 NA conversion (gone but not forgotten)
94 Cadillac Fleetwood (sold)
08 Aerolight 23TT
06 Vortec Max Silverado CC SB (sold)
10 Avalanche (electronic quagmire but love the truck)
what about a 5 speed i noticed diesels clutches are all different numbers from gas motors, even when they dont have the dual mass flywheel, is there anyway to reuse a gas clutch/flywheel? are the crankshaft patterns the same where your flywheel/flexplate bolts on?
i cant seem to get it started now that its in my one ton
finally got it runnin but its kinda rigged.i still need to find the power steering brackets.
are one and two peice rear mains the same as far as the flywheel
mark
The clutch disc used with the dual-mass diesel flywheel does not have any internal springs or dampers. The clutch disc used with the newer single-mass diesel flywheel incorporates a series of springs/dampers.
So.... you have to be sure what flywheel you have before ordering/installing a replacement clutch disc.
The same flywheel/flexplate can be used on either rear main seal engine.are one and two peice rear mains the same as far as the flywheel
mark
Jim
I have a 1990 Chevy K2500 with a 6.5 V8 Turbo Diesel in it. I was woundering what kind of motor(s) I could swap out and also what else I would have to swap for the gas motor. And could I keep the turbo for the gas.
Hi
Any GM truck engine will fit,250 6cly,283-400 small block,or 454 big block.
You will have to go to a carb and distributor.Unless you want to swap in the wiring harness from a gas truck of the same vintage.If you have an auto trans you will have to change the tourge converter.And no you can't keep the turbo from the diesel and use it on the gas.
You would be further ahead to replace the diesel engine.You say it's a 90?
If so someone has already replaced the engine,it would have come with a 6.2 mechanical injected,and no turbo.
Whats wrong with the engine? Lots of help here if you want to fix it.
Thomas
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews
Do you know of any low mile 4x4 donors. Prefur a 6.5
Thanks!
Hello there ... New on here ... Which trans are you going with .. If you use the TH350 you can get a variable modulator valve that you just make slight adjustments to until you get it shifting where you want it ... I am not sure with the TH400 .. but the 700R4 is the easiest of all.. you simply pull the pan ( you would want to install a new filter kit anyway ) and while you have it dwn you pull out the electric lockup actuator and put a 5/16 rubber ball bearing on it and place it back in .. this makes the 700 work completely automatic .... you then just have to have the shift valve control cable hooked up and set propely .. ( although there are different valves available for gas and diesels ) this cable not only controls the shift range but also controls the pressure applied to the clutch packs so it is vital that it is hooked up on a 700R4 ... I made this mistake once with my '66 chevelle and burned up my tranny ...