[jjcymru]

my 2.8 is a little asthmatic to say the least anyhow ive got a good v8 6.5 chev turbo engine here and can certainly make it fit.

is there an adaptor to the 2.8 box or do i find a zd30 box??

as the td42 is very scarce here.

alternatively is there a better gearbox i could use?

I can get propshafts altered and weld on engine mounts.

i see theres a good site from poland www.karlowicz4x4.pl which do conversions.

any more info would be appreciated. Thanks

 

[GUTim]

Hey mate,

I am no genius on this matter and there will be more knowledgable people along soon.

But there is no way on this earth that the 2.8 box will handle the power or torque from a V8 6.5 Chev, let alone a turbo version. As far as I know the 3.0TD and TD42T gearbox will both handle the Chev with out a problem.

Tim

 

[bennoGU28]

The 2.8s box doenst have a torque problem but its not used as it does not have an interchangeable bellhousing. The 3.0/4.2 box gets whored around onto anything as it is a full cast box + bellhousing.

As for a 2.8 being asthmatic um well they shouldnt be.

 

[jjcymru]

well its alright but its lacking in torque personally.

a v8 will have much more low end torque.

i assume a bellhousing adapter is needed for v8 to zd30 box.

 

[ls400x]

Am I correct in thinking that the 2.8's gearbox is the same as a r33 gtst skyline? If so they have proven to be plenty durable.

 

[crayman]

Am I correct in thinking that the 2.8's gearbox is the same as a r33 gtst skyline? If so they have proven to be plenty durable.

A lot of people think the Rd28 box is the same as the GTR box (GTST is RWD only) but I can't see it.
Have to check but don't think the GTR box has that 1" extra bit on the bell housing to allow for the Rd's D.M.F.
GTR box has completely different gear ratios.
GTR box has the ATTESSA system operating the transfer case, not just a power divider but a hydraulic clutch system for the front wheel assist.
A lot of components may be interchangeable, but they're certainly not the same box.

 

[truckster]

I was under impression they are the 300zx box?

 

[bert]

my 2.8 is a little asthmatic to say the least anyhow ive got a good v8 6.5 chev turbo engine here and can certainly make it fit.

is there an adaptor to the 2.8 box or do i find a zd30 box??

as the td42 is very scarce here.

alternatively is there a better gearbox i could use?

I can get propshafts altered and weld on engine mounts.

i see theres a good site from poland www.karlowicz4x4.pl which do conversions.

any more info would be appreciated. Thanks

is your vechiel right or left hand drive if it is right hand drive you'll have trouble with the factory 6.5 turbo and exhaust and steering

 

[crayman]

I was under impression they are the 300zx box?

Well the Z cars are only RWD, so completely different gear case and mainshaft plus those "unique" Rd28 ratios rules out using the gear sets.
I think the Rd box must be a 1-off.

 

[jjcymru]

it is rhd, maybe im restricted to using a non turbo engine so the manifolds dont foul the steering box

 

[easys4.2gq]

Easier and stronger to swap the 2.8 box out for the 4.2 4.5 zd30 box etc, keep 2.8 transfer so you don't ned to change tail shafts and diff flanges, the transfer will bolt up with a small mod.
I don't think you can get an adaptor to join the 6.5 to 2.8 box.

 

[jjcymru]

having looked at pictures online it appears the turbo of the v8 is going to foul the steering column shaft and box

 

[natlmarine]

having looked at pictures online it appears the turbo of the v8 is going to foul the steering column shaft and box

Try the factory centre-mount option.....

 

[camp road]

Hey mate,

I am no genius on this matter and there will be more knowledgable people along soon.

But there is no way on this earth that the 2.8 box will handle the power or torque from a V8 6.5 Chev, let alone a turbo version. As far as I know the 3.0TD and TD42T gearbox will both handle the Chev with out a problem.

Tim

I thought the 2.8 box was a good one??? there used at the drags eg: V8 KILLER RB30 [email protected] creek 600Bhp pass's @ low 10's with a salisbury diff no prob as of yet and possibly alot more tho ranging from supra's box's tremecs etc my point is you have top loaders box's accompanied with 9 inch diffs with a big reputation of being very strong but are blowing up just as much or more (personal experience) then you have the tremec 6speed & turbo 700 out of vx commodore etc there not rated and have the occasional blow up in just a tradies ute stock ls1 ute at the same time you have legal 1/4 mile street comp racers throwing huge kw figures with brass button clutch's and big racing slicks at these box's tremec 6speeds n turbo 700's without fail...