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A couple weeks ago I wiped a cam lobe (#5 exhaust) in my 270hp/350 71. There was a Lunati cam in there and maybe it wasn't set up right. Simultaneously on the same day and on the same trip that I was almost stranded due to the failing engine, my TH400 also stopped shifting out of 1st. It seems like it might even try to shift out of first and then into neutral. Wow, such luck! Simultaneous engine and trans failure!?
The failed cylinder #5 in the motor is severely scored with cupped lifter, all intake valves are caked with piles of carbon and the inside of the manifold is wet/oily. Actually all cylinders are scored but #5 is the worst.
Working in my garage on jack stands, I will be removing the motor to drop off at the builder. I guess I should also remove the trans to drop off at the trans shop. I am seeking advice on how to remove the trans when on jack stands (I would love it if someone could inform me that maybe the trans is not shifting cuz the motor was failing and vacuum was messed up.... the simultaneity of all this is perplexing):
1. How high do I have to get the car up to be able to slide out the TH400? I am looking at purchasing a motorcycle jack or trans jack to help with the removal, but concerned about clearance to get the trans out from under the car while resting on the jack. I don't want to do the floor jack balancing act if possible.
2. What are the best locations for the jack stands? Is it OK to use jack stands at the front of the frame rails at the sway bar mounts? I don't want to bend or crush anything. The frame is in pretty good shape.
Thank you for your help!! Tight quarters in my garage are preventing me from the simultaneous motor-trans extraction.
I remember those days….you’ll probably need about 24 inches from the bottom of the frame rails. If you have to, slide it out the back for the most clearance. Two jackstands on both sides of the car and a floor jack supporting the engine under the oil pan.
Last edited by cmashark; Jan 16, 2025 at 09:51 PM.
TH400 Removal/Install on Jacks
