TVR S1 Gearbox rear oil seal

[RoLS]

Hi,
I noticed my gearbox is leaking oil at the rear seal (at the propshaft exit).
Can anyone point me towards a step by step guide to replace the seal and which new seal to buy ?
Kind Regards
Robin

[TVRees]

Here's a link for the type 9 gearbox.

https://drive.google.com/file/d/0Bw2UHUb5GKJ6M0pKZ...

I know this was on the S2, since I got me one of those. Hopefully on the S1 as well

[phillpot]

Rear oil seal, Ford 'type 9' gearbox ....... clicky



if you can get the back end of the car higher than the front you won't loose too much oil when youi pull the propshaft out.

Hammer an old screwdriver into the seal and prise it out and ideally a large socket same diameter to tap new one in.


there's also a 'knack' to getting the propshaft out

[Fefeu52]

It depends on the model. If your car is an S3, there is a cross-member near to the diff and you won't be able to remove the propshaft.... even with the car on a lift.



I had to modify the chassis to make this pipe removable :

[RoLS]

Hi,

Thanks for the replies !

@TVRees: Thank you for the manual, wil try it this weekend.

@phillpot: Was thinking of draining the oil first and putting in new oil. Selecting 1 gear from standstill is sometimes difficult, have to select 2nd first and then go to 1st. Think this may have nothing to do with the oil but rather fact that maybye 1 gear hasn't got a syncro so by selecting 2nd gear first I allign the gears ? Just a wild assumption, and i hope i'm wrong therefore i'm hoping the oil change does have an effect :-).

@Fefeu52: Mine is an S1 but i do also have that cross-member. Had to do something similar to remove my oil sump 3 years ago, don't really like cutting the chassis. There is no other way ? Removing the diff ?

I also noticed that the previous owner must have changed the propshaft. (Bought the car in 2015, propshaft is from 2011 and has writings on it in dutch, looks stil new) When i drive the gear leaver moves up and down a bit (dancing). This got a lot better after i replaced the engine mounts, but it is still there. Could there be a problem in allignment causing the seal to wear more quickly ? Gear leaver moves up and down approx 0,5cm while driving (used to be 1-1,5cm). Or is it normal ? Gearbox mounts look ok.

[Bercilac]

My 1988 S1 has the type 9 'box and I replaced all the engine, gearbox and diff mounts during the rebuild so it is all in correct (well, factory!) alignment.

My gear lever doesn't move up and down at all and all the gears are easy to find, however, initially I fitted a short shift spacer kit and found reverse far too easy to hit instead of first, and first to second very, very notchy.

I removed the spacer and reset the depth of the lever yolk and all is well now. I'm sure a correctly fitted short shift is a joy, but I'm kinda fine with what TVR/Ford intended as mine is purely a road car.

[RoLS]

HI Bercilac,

Since i hope the engine mounts were the hardest part maybye all have a go at all other mounts.
Can you point me towards which mounts to buy ?

[Fefeu52]

RoLS said:

@Fefeu52: Mine is an S1 but i do also have that cross-member. Had to do something similar to remove my oil sump 3 years ago, don't really like cutting the chassis. There is no other way ? Removing the diff ?

Yes, this is the only other way. Just before cutting the chassis, I had nightmares and existential questions.... But now, I know this is on of the best modifications I've done on the car. Since then, I removed the proper-shaft 3 times !

And I will probably do the same job on the front cross-member to be able to change the oil sump gasket.

RoLS said:

Could there be a problem in allignment causing the seal to wear more quickly ?

The seal is just in front of a bush. If the bush is worn-out, the seal wears quickly.



https://www.motorsport-tools.com/ford-type-9-5-spe...

But I don't know if it is possible to replace this bush with the gearbox in place and with the gearbox output shaft in the center.

[RoLS]

Fefeu52 said:

The seal is just in front of a bush. If the bush is worn-out, the seal wears quickly.

If the bush is worn, than i suppose i should feel some play in the propshaft ? At this point, with everything still in place (except exhaust) there is no play.

[RoLS]

Fefeu52 said:

I had nightmares and existential questions....

my feeling indeed

[Bercilac]

RoLS said:

HI Bercilac,

Since i hope the engine mounts were the hardest part maybye all have a go at all other mounts.
Can you point me towards which mounts to buy ?

If you search for this gearbox mount: TVR 025F 002A I think that if your engine mounts are ok then that is the next weak link in the system.

From memory you would need to support the gearbox on a jack and then undo the four bolts.

Less likely to cause a problem are the diff mounts and as these are quite expensive and tricky to get at with the body on the chassis (well they look tricky to me!) I would try the gearbox mount first. But here are the diff mounts from my reference photos taken when stripping the car down.

[phillpot]

The propshaft will come out, you need to undo the two big bolts holding the front of the diff up, lower the front of the diff and the propshaft will slide back past it enough to drop out of the gearbox.

Gearbox oil change could be tricky, there is no drain plug. Syphoning out from the fill/level plug might work, I'd suggest some kind of pump rather than trying to suck it through a tube

Gearbox mounts are well known to split and perish. Well worth having a proper look, and having got that far ( removing it) replace it anyway. CLICKY

Most unlikely the rear bush in the gearbox is too badly worn, hopefully it isn't coz only way to change that is full strip down!


Not surprisingly these are all issues that crop up time and time again, they have all been discussed here on PH in the past.

Google search ..... Pistonheads TVR S Series removing propshaft

Edited by phillpot on Tuesday 21st April 18:10

[RoLS]

Finally got around to finish the job. Propshaft came out relatively easy, removing oil seal was a bit more difficult !
Thanks for all the good advice !