GU differences???

[GQ Bear]

Is there much difference aside from engine b/w 4.2td, 3.0td and 2.8td as in gearbox, transfer, driveshafts, axles, diffs, clutches, etc.

Just looking into building up a rig, looking at engine swap and wondering if different models make a difference.

Also are their any particular years/models to steer clear of?

thanks

[tna racing]

same drive lines diffs and motor gearboxes stuff like that although the gu stuff is stronger

[MyGQ]

ok the 4.2L Diesel engine in the GQ and GU are the same apart from Tweaked diesel pump on the TD model, Gear Box are interchangable as are drive shafts and transfer case

the TB45 gearbox can be mated to the GQ and GU 4.2D with a bellhousing change.

the 2.8L diesel GQ motor has mechanical pump where the 2.8L GU diesel can be chipped for more power, the gearbox in the GU 2.8 and GQ 2.8 are the same, its also the same gearbox that is in the GQ 3.0L Petrol engine with new bwllhousing.

3L Diesel has a new box so it won't mate to anything other than the 3L diesel.

[PGS 4WD]

Gu track is wider, Just put a TB45 in a GQ, made a distributor from Gq points dissy as am running a delco (VN-P) computer, only to find the distributor drive gear and timing case have some differences, have to put the GU dist drive gear on and shorten the shaft under the gear. Bolted straight up to GQ gearbox, clutch etc, different top and bottom water hoses, nothin to major.
GU steering box bigger and stronger, later GU panhard rods have one rubber bush and one nylon/steel. Front stub axles differ and GQ has bigger brakes 2 sizes of disc, same calliper to my knowledge on both GU's early and late. Gq has also twin and single piston calliper. Drag link is longer due to wider track and tie rod ends differ. GU front centre differ slightly, have to remove 2 mm from end of front axles to fit GU axles into GQ centre when fitted to GU housing. Control arms on GU have are a 2 piece unit, stronger and bigger.
2.8 has 4.6 :1ratio diffs the 3.0 4.3:1 and the 4.2, 4.5 , and 4.8 4.11:1. The GQ 3.0l has a smaller gearbox, This may also be true for the 2.8td. The 4.2 intercooled turbo isnt water cooled and the td42 non-intercooled is a water cooled turbo.
There is a large rear differential, only available in 4.11:1

None of this is more than what I've found in my experience, if anyone has found different I'd be keen to know.
Joel

[nastytroll]

GU n GQ 2.8 deisel gear boxes are different thickness on the bell housing flange by about 20mm n the bell housing is part of the gear box so it is a big job to change over

[mickyd555]

the 2.8's are a good base for an engine swap as they have 4.6 diffs already, the early 3.0L's have a H260 rear diff with 4.3 gears as well. The leaf cab utes have full floating axles in the rear H260 4.3 ratio'd diff. I have never seen a H260 with 4.1 gears?? and i know snake make 4.6's for them as well (if you have the coin) I'm yet to see a H233 with full sloating axles but i was told yesterday they existed so maybe look for one of them too. In all seriousness though i think you would be hard up breaking a GU diff anyway

If you start with a 2.8 you will need a new gearbox i think as i have never heard anyone rave about how strong they are (but maybe i just wasnt listening).

The injector pump on a GU TD42 engine is a better to start with than the pump from a GQ, the one from a turbo is even better. They can all be built up its just a matter of cost in the long run.


I reckon a good start is a leaf sprung GU non turbo ute (thats what i started with)

[GQ Bear]

thanks for your reply's peoples. I think i took too many liberties in expecting people to read the post subject. I was asking for GU specific, not comparing to GQ's (my bad for chucking the 2.8 in there)

So basically i'm toying with the idea of running a twin-turbo 6.5l chev deisel in a GU patrol, chopped down to a mid-wheelbase extra cab tube-tray ute, or full body mid-wheelbase.

The project is in it's VERY early planning stages. I'm basically trying to establish whether i can begin with a 3.0td GU which are more common and cheaper than 4.2td's.

Hey Mickyd555, what year's the non-turbo leaf sprung ute come out? Can they be modified to run Fox racing shocks and A-frame rear?

Does anyone know how and where from I can get my hands on a GU shorty Right hand Drive? Is there much involved to make them comply to Aussie Standards for registration.

[j-top paj]

I have never seen a H260 with 4.1 gears??

shoulda looked at mine before i went 4.88s

[mickyd555]

[mickyd555]

Hey Mickyd555, what year's the non-turbo leaf sprung ute come out? Can they be modified to run Fox racing shocks and A-frame rear?

You can mod it to do whatever you want. they are the same in the front as any other GU, its only the back (which is under a tray where there is no panels needing modification) that is different. The Leaf sprung chassis is also longer than its coil'd cousin as the rear shackles have to be a bit further back.

I dont know what year it started but they are all turbo diesel now. Mine is 2000 so it was after then somewhere about 02/03.

If your looking to start with a 3.0 with a busted engine these are rare as they are a very strong engine then i think you may be on the right track to a good truck. you will need to chop all those extra panels off though even if it means leaving the kids behind

[mickyd555]

I have never seen a H260 with 4.1 gears??

shoulda looked at mine before i went 4.88s

cool i love being corected. this was a 4500 i take it from ya sig?

[j-top paj]

yeh 4.5 petrol

[GQ Bear]

Hey Mickyd555, what year's the non-turbo leaf sprung ute come out? Can they be modified to run Fox racing shocks and A-frame rear?

You can mod it to do whatever you want. they are the same in the front as any other GU, its only the back (which is under a tray where there is no panels needing modification) that is different. The Leaf sprung chassis is also longer than its coil'd cousin as the rear shackles have to be a bit further back.

I realise the leaf springs are only in the rear, what i was asking is if it can be converted to run a Fox Race Shock type system with an A-frame. Spring and shock towers/mounts are removed in std coil setups too in order to run this setup. Is there any pros/cons in using a leaf chassis as a platform as opposed to std coil chassis?

[mickyd555]

Hey Mickyd555, what year's the non-turbo leaf sprung ute come out? Can they be modified to run Fox racing shocks and A-frame rear?

You can mod it to do whatever you want. they are the same in the front as any other GU, its only the back (which is under a tray where there is no panels needing modification) that is different. The Leaf sprung chassis is also longer than its coil'd cousin as the rear shackles have to be a bit further back.

I realise the leaf springs are only in the rear, what i was asking is if it can be converted to run a Fox Race Shock type system with an A-frame. Spring and shock towers/mounts are removed in std coil setups too in order to run this setup. Is there any pros/cons in using a leaf chassis as a platform as opposed to std coil chassis?

Leaf chassis is identical to a coil chassis barring the most rearward crosmember and the rails are about 200mm longer as well to the rear. So no, there is no distinct advantage to using the chassis, the rear diff is the only bonus.

[AJ]

Some/a few early (1997-99) GUs - particularly utes - had the PTO on the side of the gearbox. Was totally random as to whether you got one or not.

Petrols and manual trans 3.0TDi diesels got the H260 rear diff. It also randomly appears in others....