Is it time for a new automatic gearbox ?

[greffel]

Thanks for great support and pictures.
So if I have to shim its the same way that I did the angle gear...

Software no problem ?
Wiring to the control system no problem ?
If I count the amount of tooth an the diff and find them to be the same, then there is of course no point in swapping ?

I think the R gearbox will be perfect for this car since it has a 18T, injectors and exhaust.

This will 100% cure the flare from 3-4 that I have been living with for the last 2 plus years !! ??

[vtl]

> Software no problem ?

Hmm.... Good point. You may need to check the B5 spring in valve body and adjust to the actual B5 as it is in your valve body. I don't remember the MY split, but earlier VBs had the spring and later - don't.

Otherwise, if the final drive ratio is the same, sw wouldn't even notice.

> If I count the amount of tooth an the diff and find them to be the same, then there is of course no point in swapping ?

Right.

> This will 100% cure the flare from 3-4 that I have been living with for the last 2 plus years !! ??

That's the valve body most likely.

Also, I think it is possible to swap the transmission in as is and have the ECU reflashed with R's version, so the new gear ratio wouldn't come as a surprise to sw. Of course, the fuel consumption will go up slightly, along with a greater torque to wheels. If you don't mind that, you may want to investigate such a possibility first. MVS user @doublebug may gave you a hint.

[firstv70volvo]

...
If I count the amount of tooth an the diff and find them to be the same, then there is of course no point in swapping ?

...

I'll need Vtl and your input on this but if both differentials are AWD and the final drive ratio is different I think you could just swap out the big gear on the differential so you would be using the original gear of your current transmission with the R differential core and this way you possibly wouldn't have to do anything with the preload. This assumes the preload is good with the R differential and the AWD differential is compatible between the two transmission. You would also be changing out the small drive gear.

Another thought is you measure the thickness of the selective shim in both transmission before doing anything else and if the thickness of the shims match then don't swap just the gear as suggested above, swap the entire differential because the preload will likely be good or very close. You may have to do it this way anyway.

AWD 2.65 final
https://www.volvoclub.org.uk/tech/r-05-specs.shtml

[Oly850]

Might do to check if the shifter cable in the engine compartment is actually moving the PnP selector, the PnP could be loose as well, perhaps the fastener came off, worth a check. I 2nd the motion on a possibly clogged filter.

[vtl]

I'll need Vtl and your input on this but if both differentials are AWD and the final drive ratio is different I think you could just swap out the big gear on the differential so you would be using the original gear of your current transmission with the R differential core

The differential assembly circumferences are constant for any gear ratio. So if a new gear has more (or less) teeth than the old one, the other gear in final drive should accommodate for that. I.e. can only swap differential by using both mated pieces.

[firstv70volvo]

I'll need Vtl and your input on this but if both differentials are AWD and the final drive ratio is different I think you could just swap out the big gear on the differential so you would be using the original gear of your current transmission with the R differential core

The differential assembly circumferences are constant for any gear ratio. So if a new gear has more (or less) teeth than the old one, the other gear in final drive should accommodate for that. I.e. can only swap differential by using both mated pieces.

Yes, swap both the mated pinion and ring gear from his original car and what I was thinking is unbolting the ring gear from the carrier and swapping just the ring gear from his current car instead of the whole differential to possibly preserve a correct differential preload in the R transmission. Assumes AWD differentials are the compatible.

[vtl]

Assumes AWD differentials are the compatible.

I think there was a split in collar sleeves across MY? Anyways, need both transmissions out, things like that would be easy to check.

[greffel]

When or If I get this far with the swap I will most likely post something here and ask for advice
But we agree that a swap to this R gearbox is possible ?

[vtl]

It is.

[greffel]

Phuuu !!!
Busy day.... got the old gearbox out and of course it took longer then expected.
This was the first time for me so there is time for improvements ( the left axel was a pain in the as to remove.)

Tomorrow I will open the R box and change the diff. So now I need a little help.
Should I replace both 1 and 2 from this image or is 1 enough?,