BZ Touring. Manual conv. Pulling to the left under acc. help

[FST4RD]

Just a random thought...
You haven't got a bent suspension arm or perhaps a slogged out bush? If you were accelerating and had a slogged out bush one wheel might pull off in a different direction?
Wheel alignment?

[Mr Revhead]

Its been for an alignment and check up so those things should be covered.
I was thinking same as 85aw20v but struggling to think how a helical diff can act like that.

It is helical isn't it? Or have you fitted a clutch pack diff? If it'd clutch pack it'll be the diff

[RobertC]

Problem solved!!! Well sort of...

Took out the current gearbox which was a C56-04C. (factory AE111 super strut LSD box) (Helical?)


Replaced it with a C56-04A. (factory MS ae111 box) Car now drives perfectly...


So ideas on what could be wrong with the LSD box?

Assuming it was in working condition when I received it the only thing that could have possibly damaged it would be when I was trying to put the drivers side drive shaft in with the AUTO hanger bearing bracket bolted to the block (this meant the shaft was trying to go in the box on an angle)

[Mr Revhead]

It pulls hard left which suggests less drive to the left axle.

I have no idea how that can happen in a helical type

[sergei]

It pulls hard left which suggests less drive to the left axle.

I have no idea how that can happen in a helical type

catastrophic failure locking up one side completely, while leaving other freewheeling.

[RobertC]

It pulls hard left which suggests less drive to the left axle.

I have no idea how that can happen in a helical type

catastrophic failure locking up one side completely, while leaving other freewheeling.

But I could still leave two solid marks in the paddock. (so both wheels were certainly getting drive)

[MrOizo]

It pulls hard left which suggests less drive to the left axle.

I have no idea how that can happen in a helical type

catastrophic failure locking up one side completely, while leaving other freewheeling.

But I could still leave two solid marks in the paddock. (so both wheels were certainly getting drive)

An open diff can spin both wheels if on grass. Try again on seal

[Mr Revhead]

It pulls hard left which suggests less drive to the left axle.

I have no idea how that can happen in a helical type

catastrophic failure locking up one side completely, while leaving other freewheeling.

I'd like to think he would notice a wheel not turning at all

[RobertC]

It pulls hard left which suggests less drive to the left axle.

I have no idea how that can happen in a helical type

catastrophic failure locking up one side completely, while leaving other freewheeling.

I'd like to think he would notice a wheel not turning at all

both wheels 100% did have drive. (Put it in gear while up on axle stands)

And the part of the paddock was the driveway so had a gravel base. Was surprisingly grippy. Trying to replicate it with the open diff will certainly result in a one wheeler peeler

[d1 mule]

gravel and grass sounds very slippery to me. I dont know the ins and outs of FWD diff stuff so i havnt commented till now, but it sounds exactly the same as when i blew a locked diff in my old ae85, had 100% drive to the right wheel and 0% to the left, similar symptoms. I would be betting on a shagged diff

[Mr Revhead]

It pulls hard left which suggests less drive to the left axle.

I have no idea how that can happen in a helical type

catastrophic failure locking up one side completely, while leaving other freewheeling.

I'd like to think he would notice a wheel not turning at all

both wheels 100% did have drive. (Put it in gear while up on axle stands)

And the part of the paddock was the driveway so had a gravel base. Was surprisingly grippy. Trying to replicate it with the open diff will certainly result in a one wheeler peeler

A $&#$% diff could still turn a wheel that's not loaded though.

[RobertC]

considering changing the gearbox has fixed the problem there must be a problem with the old gearbox. The diff being the only bit that's going to cause the pulling to one side.

So the question now is should I pull it apart?

Haynes manual says 5 stars

Will there be visually broken bits?

[Mr Revhead]

Start googling how a helical diff works? You could drain the oil and check that. If there's broken bits there should be bits in the oil

[thegreatestben]

There's more than one way to split a C series box. I did it the sneaky way when changing the bellhousing on my MR2. That doesn't involve removing 5th gear and gives you access to the Diff. If it doesn't necessarily need to go back together it'll be a good learning experience.

[85AW20v]

There's more than one way to split a C series box. I did it the sneaky way when changing the bellhousing on my MR2. That doesn't involve removing 5th gear and gives you access to the Diff. If it doesn't necessarily need to go back together it'll be a good learning experience.

The box will come apart about 20mm leaving 5th gear on and you can get a spanner in through the gap to undo the bolts that hold it together. I put my LSD in to my C52 this way. Can't remember what it is that's bolted up....

[RobertC]

Well....

Drove 200km yesterday with the non lsd box and it turns out it still veers to the left slightly. (power or no power)

So I'm thinking there is still something wrong with the car drive line.

My brief understanding of a torsion diff makes me think if one of the shafts is misaligned it could be causing an uneven torque input hence a funny output from the diff .

Previous owner of the lsd box talked to who he purchased the car from and it definitely was not doing anything funny before it was sent to me.

the open diff box not being torque sensitive meaning alignment is not so crucial hence no torque steer.