Diff swap over.
Discussion
Just got JAR1Y Back and it's bonkers fast..too fast for me! The previous owner had replaced the upgraded hydratrak diff with an apparent ex race team Lower geared 3.73:1 diff - and solid mounted it...unfortunately it's groaning and as it's solid mounted its resonating through the chassis!
All is not lost as I have the original with less than 15k on it so I'll just swap it over...is this a job that can be done without ramps and what are the problems to look for?
All is not lost as I have the original with less than 15k on it so I'll just swap it over...is this a job that can be done without ramps and what are the problems to look for?
Easy enough on axle stands. How have they mounted it then. Are you going to need the three mounts to be able to mount it with bushes.
Polybush them any way to avoid future top mount deterioration.
I think I'd be having a good look around the area of the diff mounts for any fatigue given it was solid mounted as there would be no give and as you said been vibrating the whole car.
Polybush them any way to avoid future top mount deterioration.
I think I'd be having a good look around the area of the diff mounts for any fatigue given it was solid mounted as there would be no give and as you said been vibrating the whole car.
Sorry to disagree, but I'm not so sure that it is that easy. First you need to remove the strengthening plate then the exhaust, most likely the rear anti roll bar will be in the way, speed sensor to disconnect as well as propshaft, drive shafts to disconnect and if your diff has been welded in place then I think you may be in for a lot of trouble - I'd hate to try doing all this without either a pit or ramp - I'd definitely do a bit more research before diving in - best of luck!!!
Is it the standard type diff?
How has it been solid mounted, by putting solid mounts in the bush housing, or fabricated one offs?
If its a plated diff i wouldnt mind the centre clutch pack.
If its a standard type then knock the drive shaft flanges out otherwise its a super wriggle to get out.
If the car is a 98 on, the roll bar is above the diff so you wont need to go near it.
How has it been solid mounted, by putting solid mounts in the bush housing, or fabricated one offs?
If its a plated diff i wouldnt mind the centre clutch pack.
If its a standard type then knock the drive shaft flanges out otherwise its a super wriggle to get out.
If the car is a 98 on, the roll bar is above the diff so you wont need to go near it.
mikeufo said:
Sorry to disagree, but I'm not so sure that it is that easy. First you need to remove the strengthening plate then the exhaust, most likely the rear anti roll bar will be in the way, speed sensor to disconnect as well as propshaft, drive shafts to disconnect and if your diff has been welded in place then I think you may be in for a lot of trouble - I'd hate to try doing all this without either a pit or ramp - I'd definitely do a bit more research before diving in - best of luck!!!
I have changed a fair few! Just a pita getting the new one back in and mounted.
mikeufo said:
Sorry to disagree, but I'm not so sure that it is that easy. First you need to remove the strengthening plate then the exhaust, most likely the rear anti roll bar will be in the way, speed sensor to disconnect as well as propshaft, drive shafts to disconnect and if your diff has been welded in place then I think you may be in for a lot of trouble - I'd hate to try doing all this without either a pit or ramp - I'd definitely do a bit more research before diving in - best of luck!!!
I done it on the drive with axle stands. I found best lowering the diff onto my chest then sliding it into a foam pad. Mainly because it has to go in at an angle to get past the chassis. I've done this with the car on axle stands too. It is tough, but I'm a skinny little fecker, so if I can do it anyone can!
From what I remember I lowered it down with a trolley jack, but put the new one in on my chest, lifting it into place, sticking the rear diff mount bolt in (just to hold it), then positioning it with a trolley jack, then putting the front mounts and bushes in, then taking the rear bolt out putting the bush in place.
The tricky bit is figuring out the jaunty angle it needs to be pulled out and put in at.
I would imagine it could be done in a long day. Think I took about three evenings to do it. Of course if you get a stuck mounting bolt or tricky bush then you can easily double a time estimate!
From what I remember I lowered it down with a trolley jack, but put the new one in on my chest, lifting it into place, sticking the rear diff mount bolt in (just to hold it), then positioning it with a trolley jack, then putting the front mounts and bushes in, then taking the rear bolt out putting the bush in place.
The tricky bit is figuring out the jaunty angle it needs to be pulled out and put in at.
I would imagine it could be done in a long day. Think I took about three evenings to do it. Of course if you get a stuck mounting bolt or tricky bush then you can easily double a time estimate!
itsallyellow said:
If that's the case it sounds to me as if you have a tuscan challenge gearbox rather than a diff..... Tuscan challenge diffs don't make a noise.
Mike
Hmmm... The plot thickens, I've made contact with one of the mechanics who used to work on the car at Noel flannery's V8 spots & classics in east Lothian who swears blind he got to take the car home one evening and as the car was so powerful he got it to do a wheelie!!Mike
I'm going to see him on Saturday so he can take it for a spin..
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