RPM and what speeds? R180 5sp comb

[matto]

I have just got an S130 which was an auto (1982 model) and a PO has converted to Manual.  Looks reasonable job but still seems to have the R180 auto diff in.

 

I have not been able to ID GB yet as car has not been on hoist. I think its a 280zx manual ?  How can I tell with this combo what ratio the diff is - can the ratio be changed in the R180 or what are the implications of the Auto R180 diff with a 5 sp Manual might be.

 

Engine does not appear to be revving to hard - around 2500 at 100kmh in 5th.  Any advice appreciated.  Also how can I identify the gb I have?

 

Thanks

[C.A.R.]

No Idea until you look at the shifter and/or count the number of rotations of the input shaft, verses the output shaft while it's in 1st gear.

Do a search for the rest of the info.

 

It also sounds like it's a 3.54 ratio diff.

[Zedman240®]

I feel like I've said it about 100 times before but from memory, if it's a 280ZX box, oil filler plug would be on the passenger side. 260 gearbox's have them on the drivers side away from the exhaust and easy to get to. But it depends if bell housings have been changed etc..

[C.A.R.]

Fug, I should have remembered that!

[matto]

Thanks for the replies guys - I'll have a closer look

 

Just another question.  As the car was an Auto it would have had the Auto ECU.  Does the ECU have to be changed along with the GB - I have not seen anything in the various posts for Auto - Manual that say the ECU should be changed I'll have to get the covers off and see which ECU I have -  I've got an ECU from a manual but don't want to stuff around as car runs ??  Again any thoughts appreciated.

[PZG302]

Thanks for the replies guys - I'll have a closer look

 

Just another question.  As the car was an Auto it would have had the Auto ECU.  Does the ECU have to be changed along with the GB - I have not seen anything in the various posts for Auto - Manual that say the ECU should be changed I'll have to get the covers off and see which ECU I have -  I've got an ECU from a manual but don't want to stuff around as car runs ??  Again any thoughts appreciated.

 

I'm pretty sure the ECU's are the same for manual/auto as the auto was not an electronic box and the EFI was a simple Bosch system.