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MG MGB Technical - transmission mounts

This last weekend I replaced the U-Joints in the Ol'Ladys 79 MGB (NOT OD). I noticed that the Rubber Transmission mounts are very worn. In fact they almost look like Jello.

How hard is it to replaces thees mounts?
Any tips before I start?
Do they make the Neoprene mounts for these?


Thanks in advanced
Bob
rsf fowler

I changed mine in situ and its a real B*stard. You have to let the cross member down and its still fiddly. Mines an overdrive box.
Paul Hollingworth

Bob. All of the mounts I have used over the last ten years have been rubber and I have not found a source for a better quality mount.

With the non-OD box it is relatively easy to change out the tranny mounts. But, if the mounts between the transmission and the cross member are bad, there is a good chance that the round mounts (two) used to attach the two pieces of the cross member together and the rubber mounts for the engine movement rod are also bad. It would be a good idea to check out which mounts are bad before taking the cross member off so that you will be able to complete the job in one session.

When it is time to do the job, first remove the shifter from the top of the transmission so the transmission can be raised and lowered without the shifter hitting the transmission tunnel. (I do not know that this is always necessary, but have always done it in the past because I am commonly working by myself. If you have an assistant, it may be possible to keep an eye on the position of the shifter and not remove it unless it is necessary. But, it only takes a few minutes and allows you to check out the anti-rattle system and replace the nylon bushing at the bottom of the shifter while it is removed.)

Support the rear of the transmission with a jack. Remove the outer bolts of the cross member. Lower the transmission and cross member, as necessary, to allow access to the four bolts (two on each side) that attach the transmission to the cross member. Remove the engine steady rod from the front of the cross member. Remove the cross member from the vehicle. If you are careful, you do not have to remove any of the exhaust system to do this.

Clean the cross member, install any new rubber pieces that are necessary. If the "donuts" need to be replaced, warm them in hot water and lubricate the metal parts they are to fit into with silicone grease/spray. It will make it easier to assemble them.

Install the cross member, with the new rubber parts, onto the transmission. Jack up the tranny and bolt the cross member to the car chassis. Install the engine steady rod. Install the shifter. Check everything for tightness.

With an OD tranny, this job is a bear to do. With the non-OD tranny it is relatively simple, especially if you have an assistant to help you with it.

Les
Les Bengtson

Thanks for your quick responses. I will crawl under it again tonight and make sure what all i need for i can order it all at once.
rsf fowler

When you've removed the crossmember you can drill a hole [ approx 14mm ] on bothsides in line with the hole the mounts come through secured by the 1/2" nuts, you can fit new mounts to the box then offer up the crossmember and using a socket put the 1/2" nuts back on and tighten, the 2 bolts on the underside are easy to refit

Mike
m j slater

It was a bit of a bugger...but also gave me a chance to clean and refurbish the crossmember...
Pete

This thread was discussed between 09/03/2009 and 10/03/2009

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