Lm7 swap help

[fmanak72]

If he moves the transmission fwd, yeah he will.

Not going to chance it using proper mounts lesson learned should have done my homework

[silverado_lover]

If he moves the transmission fwd, yeah he will.

I've seen a couple build threads of guys using stock location mounts and I've never seen anyone have to get a custom driveshaft

[chevyracer8262]

I had that same problem when I made my ls swap mounts out of some 1/4" thk 4" wide steel flatbar I drilled and tapped the req'd holes for both 0 offset and 1" offest just in case and first tried to drop my 01 5.3 in and bolt the existing 93 4l60e to it only to find the 1" gap as you had then moved my mounts to the 1" offest and the trans mount and driveshaft's lined up perfectly with the stock location, when I changed from the 93 4l60 to the 01 that 4l60e that I built my mounting holes moved closer to the rear of the slot but not enough to cause any driveshaft length or cross member issues.

[remauto1187]

Thanks to all for the heads up about lisas tahoe .pdf. Very informative.

If you move the tranny forward ANY distance the driveshaft yoke will be pulled that much off of the transmission tailshaft. There is no and ifs or butts about that! Now whether or not a 1" or ? will make a difference is the question. I do know as your rear suspension goes from neutral to toward fully compressed and decompressed (your air born) your driveshaft yoke will pull even further away from the tranny tailshaft. The yoke is made to slide back and forth during rear suspension events but if it gets to far out and becomes disconnected from the tailshaft then you just chucked a driveshaft and could easily frag the backend of your transmission...or transfer case if 4x4. I have seen this happen many times but is typically caused by failed ujoints. Aint that a good day....waste your transmisson/transfer case over some $20 ujoints that people are too lazy to grease or replace when they are showing signs of failure.