1990 Nissan Patrol Diff Ratio

[gqdriver]

Can anyone help! What diff ratio is a standard 1990 Nissan Patrol GQ, Diesel Manual?? Cheers

[GeeCee]

4.11
You can also check the compliance plates - should say HG41
You can also count turns of the drive shaft for one revolution of the wheel.

[MudRunnerTD]

If you have a 2.8 TD then it will run 4.6 diffs
TD42 and TB42 run a 4.1
Not sure about the RB30 engine though? others might know. Not sure what year the RB30 was put in the GQ??

What engine do you have mate?

[gqdriver]

Its got a TD42 in it. Ill assume theyre 4.1s. Thanks

[Benno7]

TB42 & TD42 can also have 3.9 diff gears.

[97_gq_lwb]

I think the rb30 has 4.3

[Bigrig]

TB42 & TD42 can also have 3.9 diff gears.

Correct - mine for example.

[TuffTD42]

TD42 - 4.11:1
TB42 - 3.9:1
RD28 - 4.625:1
RB30 - 4.375:1
This is what I've found to be most correct from all the patrols I've owned & all the research I've done on em. Unless someone has changed ratio's some where along the line.

[Bigrig]

TD42 - 4.11:1
TB42 - 3.9:1
RD28 - 4.625:1
RB30 - 4.375:1
This is what I've found to be most correct from all the patrols I've owned & all the research I've done on em. Unless someone has changed ratio's some where along the line.

I know it's on here in another thread, but do the RB30 diff centres fit the TB42?

If so, I'd love to get my hands on a set ...

[97_gq_lwb]

From what i have read they are mostly a h233 and interchangeable but you may have to swap the flanges over i did when i put the td42 into mine as it had 4.6 rd28 diffs i left them in.

Their was a h266 wich was larger rear in some as well but i think it was utes that had them.

[Bigrig]

From what i have read they are mostly a h233 and interchangeable but you may have to swap the flanges over i did when i put the td42 into mine as it had 4.6 rd28 diffs i left them in.

Their was a h266 wich was larger rear in some as well but i think it was utes that had them.

Thanks mate - I'll suss it out a bit more.