MGB GT Tube Axle

[Boost All The Dollys]

Apparently the Reliant Scimitar GTE axle is well though of for strength and endurance. Just a thought!

I would have thought you'd need a taller diff than the 3.9 behind that Jag motor - or you'll have wheelspin is the first 4 gears at least!

Steve

The GTV8 ratio is a cool 3.07, but that's quite expensive and rare to find an original example of. I'm sure there is a aftermarket CW&P that's a better ratio

That'll be the same as a TR8 then, which is also available with an LSD, has similar mounts to a Dolomite and is only a couple of inches wider. Not cheap though, the last one I saw with LSD and disc rear brakes was £800.

Steve

Crickey, that's a lot of cash. That's why I am suggesting a MGB GT axle as it's similar width, strong, and cheaper than that. A Quaife LSD is £900 or something silly

[jikovron]

MGB and Sprint axles are both very similar in the sense that they have 6.25" diffs, similar halfshaft diameters and overall width.

I have broken a sprint axle however it was the spider gears that went after a sustained burnout laden with 4 people in the car.
Before and after subsequent replacement neither showed signs of bearing or gear distress whilst being powered by a 320NM rover 3.9 over circa 40000 miles so I would concede that a duratec 3.0 v6 wouldn't detonate a sprint axle any sooner than an MGB.

I have had a look into fitting a scimitar se5a axle to my dolomite but there is a few snags:
They have an 8.5" diff which is physically massive so the mounting points each side of the diff housing overlap onto it.
The boot floor is very close to the diff cover (may not collide).
4.5" pcd.
Diff nose is offset and longer so the propshaft needs shortening and will run close to the tunnel midway from the center bearing.
They weigh LOADS so carry more unsprung weight .

The advantage is that they come in 3.07 and 3.3 ratios latter being from OD equipped cars.
4HU lsd can be fitted with basic machining work.
they are the same width as a dolomite axle to the millimetre!
identical to a dana 44 which is standard in big block Mopar cars so power handling is no hassle.

[Boost All The Dollys]

MGB and Sprint axles are both very similar in the sense that they have 6.25" diffs, similar halfshaft diameters and overall width.

I have broken a sprint axle however it was the spider gears that went after a sustained burnout laden with 4 people in the car.
Before and after subsequent replacement neither showed signs of bearing or gear distress whilst being powered by a 320NM rover 3.9 over circa 40000 miles so I would concede that a duratec 3.0 v6 wouldn't detonate a sprint axle any sooner than an MGB.

I have had a look into fitting a scimitar se5a axle to my dolomite but there is a few snags:
They have an 8.5" diff which is physically massive so the mounting points each side of the diff housing overlap onto it.
The boot floor is very close to the diff cover (may not collide).
4.5" pcd.
Diff nose is offset and longer so the propshaft needs shortening and will run close to the tunnel midway from the center bearing.
They weigh LOADS so carry more unsprung weight .

The advantage is that they come in 3.07 and 3.3 ratios latter being from OD equipped cars.
4HU lsd can be fitted with basic machining work.
they are the same width as a dolomite axle to the millimetre!
identical to a dana 44 which is standard in big block Mopar cars so power handling is no hassle.

would a TR7 5 speed axle cope? looks very similar to the sprint axle. it even comes in 3.45 ratio. the track width is about 5" wider, so not exactly perfect, but used on the TR8