• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

General Tech Jacking Up The Rear of TR4

Share this page

KVH

KVH

Darth Vader
Silver
Country flag
Online
Do many of you guys jack up the rear of the car by putting a jack under the differential? If so, are you careful to go forward of the diff pan to avoid stress on the pan and seal?

Also, I’m just curious – – are there any issues with stability or balancing by raising the vehicle from such a narrow “sole” point. I’ve just never done it that way.

I hesitate to admit it, but I use 2 low profile hydraulic jacks and walk back-and-forth from each side to raise the rear:
 
If you have a solid-axle car, I don't recommend it, even though the owner's manual says it's OK. (Might be OK for and IRS car; I dunno.) The joint between the axle tube and the differential is not very strong, especially on some units. You can end up with a loose axle tube.

On my rear end (I mean, my car's rear end), one axle tube was loose. I can't be sure that jacking under then diff caused it, but it did illustrate how weak that joint is.
 
Mine is a solid axle. Does a loose axle tube make noise? I finished my rebuild—finally. The car is great. But I am hearing a rattle clank from my right rear. Can’t pinpoint it yet. Though I doubt it, the sound might be part of the passenger door internal hardware, like a loose window regulator, but the sound seems more like the rear fender area and I’m certain it’s not the shock.
 
KVH said:
Mine is a solid axle. Does a loose axle tube make noise? I finished my rebuild—finally. The car is great. But I am hearing a rattle clank from my right rear. Can’t pinpoint it yet. Though I doubt it, the sound might be part of the passenger door internal hardware, like a loose window regulator, but the sound seems more like the rear fender area and I’m certain it’s not the shock.
Click to expand...
I try to not use the axle pumpkin as the drain plug sits right there and the pressure goes on it.
I often use the frame cross tube near the very rear and quickly put the frame stands under the frame on both sides.
Charley
 
I use a single jack plus a 2x4 across the rear frame rails - I think just ahead of the differential (can’t remember exactly), ensuring all the loose bits (brake lines, exhaust, etc) are clear.
 
Back
Top