What's the diff?

Drivetrain articles (gearbox, torque tube, diff)
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Jonno
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What's the diff?

Post by Jonno »

heh.

Anyway. TX 8 bolt diff? What ever the preadr ones come with.

It's s*#t.
Can I ditch for later model sedan diff?

I was talking to loki about this yesterday Is there much needed to set it up?
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Re: What's the diff?

Post by LOK15 »

Straight swap apart from Torque tube mount at front near tailshaft. unbolt it and direct swap it with the one on the 8 bolt TT. Brake line will connect straight up. For swaybar you'll need to drill 4 holes ( you'll see the flat parts of the floorpan where the swaybar mounts line up ) and put a plate in under the rear seat where the bolts will go through the floorpan..
Getting too old for this s*#t!!
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Re: What's the diff?

Post by tobytj »

Brake lines may or may not be a straight swap. They are a mixture of imperial and metric brake tube fittings. The mix varies from model to model.

You may need to salvage the hose and brake lines from the TX rear end.

Fortunately the fitting to the wheel cylinders is imperial on all petrol geminis. (On diesels they are metric)
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Re: What's the diff?

Post by Jonno »

Yeah I was thinking about this about 2am this morning.
In between my missus snoring and her parents c*#t dog struggling to breathe.

I'm wondering whether I get a donor car to strip everything out of?

Need one for less than $100 is the issue
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gemsince88
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Re: What's the diff?

Post by gemsince88 »

Or put the entire braking system (lines, shoes, baking plates etc) on the new rear axle.
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Re: What's the diff?

Post by copb8 »

Just out of curiosity what is wrong with the pre ADR diff is it that it's just a borgwarner or is it something else?
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Re: What's the diff?

Post by tobytj »

copb8 wrote:Just out of curiosity what is wrong with the pre ADR diff is it that it's just a borgwarner or is it something else?
Nothing really.

They do not have an attachment for a rear stabilizer and that is the only reason I swapped out my TX and TC BW rear ends.
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Re: What's the diff?

Post by Jonno »

This^

Plus it's just a s%*tty diff in the coupe I have.
Does skid but occasionally pinches the left rear brake when I stand on the brakes the rear grabs.

Apparently this is a normal thing for these diff hence the want to ditch
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Re: What's the diff?

Post by archangel62 »

Heh, I have a Salisbury that likes seizing a brake when left sitting -_-

Yeah the other lads are on it. Brake line thread is different somewhere, pretty sure there's a way to do it too much stuffing around but it's been ages since I did it. I think you keep the T-piece with the diff.

As Lok said, keep the torque tube with the car as the xmember bolts are a different width apart. Besides that, for some bedtime reading check out my Diff Bible in the tech article section (I think it's still in submissions else drivetrain).

For what it's worth, I ran a TX diff in the carrot drift Gem because I wanted a ridiculous handbrake. Unfortunately this also resulted in ridiculous brake balance and the car liked to do spontaneous 180's during emergency stops, so I had to line lock the rear lines (too lazy to swap back to Salisbury diff) and ran fronts only... and handbrake simultaneously when stopping in a hurry.
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Re: What's the diff?

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Re: What's the diff?

Post by Jonno »

archangel62 wrote:Heh, I have a Salisbury that likes seizing a brake when left sitting -_-

Yeah the other lads are on it. Brake line thread is different somewhere, pretty sure there's a way to do it too much stuffing around but it's been ages since I did it. I think you keep the T-piece with the diff.

As Lok said, keep the torque tube with the car as the xmember bolts are a different width apart. Besides that, for some bedtime reading check out my Diff Bible in the tech article section (I think it's still in submissions else drivetrain).

For what it's worth, I ran a TX diff in the carrot drift Gem because I wanted a ridiculous handbrake. Unfortunately this also resulted in ridiculous brake balance and the car liked to do spontaneous 180's during emergency stops, so I had to line lock the rear lines (too lazy to swap back to Salisbury diff) and ran fronts only... and handbrake simultaneously when stopping in a hurry.
My BorgWarner seizes frequently. Especially when trying to reverse.
I took the coupe to a skid pan day ages back and I couldn't see the benefit of it to be honest. The handbrake lever doesn't go as high? Which I hate.

So anyway you've mentioned in the t piece for the diff?
Eli wrote:Brake line thread is different somewhere, pretty sure there's a way to do it too much stuffing around but it's been ages since I did it. I think you keep the T-piece with the diff.
So leave the later model T piece on the diff housing and scrap the TX one. Feed TX brake line into TE diff?

Or do I need to keep the TX stuff on and get the TX line to screw into the drums?

My overall plan is >

TX gaybox
TX Torquetube
TE Diff with drum brakes.
Run what ever line we can work out fits?

I want to avoid a trip to ACT Brakes

P.s Stickied the bible in the workshop submissions. Good fking work Eli
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Re: What's the diff?

Post by gemsince88 »

From memory you leave the TX T piece, put it on the new diff and keep the fittings that come off it. Take the fittings from the slave cylinders on the new diff along with the ones from the TX T piece to a brake place and ask them to make new lines with those bits on ends at appropriate length.

Be careful when choosing your diff as the 78 TD had a "Salisbury" rear axle and early brakes.
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Re: What's the diff?

Post by Jonno »

Hmm
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Re: What's the diff?

Post by archangel62 »

Glad you liked the write-up! It's definitely quicker for me to link it to folks rather than explain which LSDs fit what all the bloody time haha.

Yeah honestly I can't remember what's what with the T piece, all I know is I didn't need anything made up or re-jiggered for the drift car. That was essentially the reverse of what you're doing though, and I know there are two commonly used brake threads which are REALLY similar (to the point that you can thread the smaller one into the larger one but not vice versa). All I can really suggest is that you give it a try, if one way doesn't want to go, don't force it and try the other way instead. If GMH used any logic, the car to flexi would be the same, but then again if they used logic they would have ensured the whole lot were the same...

If your existing drum brakes seize when reversing and the handbrake's too low for your liking, you should back off the adjusters by a few clicks inside the drums, and possibly back off the handbrake a little too.
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Jonno
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Re: What's the diff?

Post by Jonno »

Finally going to get on this this weekend or the next..

Hopefully this goes well.
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