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Gearbox compatibility

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Old Jan 15th, 2021, 14:43   #11
rwdkev
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Originally Posted by 360beast View Post
Also be aware that the AW71 also came in two versions, one with a hydraulic lockup and one without, if yours hasn't got lockup then no problem but if yours does and the replacement doesn't you loose a valuable 5th "gear".
This will help fuel economy.....

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Originally Posted by Laird Scooby View Post
On a B200 it might be an advantage to not have lock-up Luke as it will still allow a bit of the "fluid-flywheel effect" to give torque multiplication shifting the engine speed up to a more efficient speed.
Lock-up only works on 4th gear (overdrive). If engine load increases sufficiently, the clutch re-opens and the torque converter is allowed to slip again to give that required torque multiplication.
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Old Jan 15th, 2021, 14:49   #12
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Thanks for the replies. Yes Dave I tried your technique and it works very well, fluid is now ruby red and the gearbox functions perfectly. Regarding a manual box I have considered this but it seems more work than I can be dealing with at the moment. Life has really been turned upside down for our family in 2020 and continues into 2021... I was hoping by buying this used box I have some form of safety net for when or hopefully if the current one fails.
It sounds as if it would be ok fitment wise. Or that's the vibe I'm getting anyway
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Old Jan 15th, 2021, 14:50   #13
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When you get as old as myself and Dave (sorry Dave lol) your priorities change.....

Having said that, we've both run a 760 V6 and we never had the choice with that particular engine - it was the only one used in the 700/900 range that was never available with a manual gearbox at any point.
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Old Jan 15th, 2021, 15:27   #14
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When you get as old as myself and Dave (sorry Dave lol) your priorities change.....

Having said that, we've both run a 760 V6 and we never had the choice with that particular engine - it was the only one used in the 700/900 range that was never available with a manual gearbox at any point.
Perhaps it's better suited to the 760 V6. I've never driven a 760 or 960 but the 98 940 auto I drove a while back was awful !

I've got nothing against auto boxes and have found the modern 6 and 8 speed ones to be very good, but nothing on earth would persuade me to have one in my 940
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Old Jan 15th, 2021, 15:44   #15
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Originally Posted by rwdkev View Post
This will help fuel economy.....



Lock-up only works on 4th gear (overdrive). If engine load increases sufficiently, the clutch re-opens and the torque converter is allowed to slip again to give that required torque multiplication.
That's where the lock-up gives the best of both worlds. I suspect on a 2.0 (which IMHO is vastly underpowered in the 7/9xx) it will spend most of its time dropping out and llowing the fluid-flywheel effect to give torque multiplication.

On my other beast, lock-up is available in 2nd, 3rd and 4th and has 3 stages, off, half and full. During engine braking it cycles through off-half-full lock-up to improve engine braking, in normal driving it often engages halfway to allow some torque multiplication before finally locking up completely. This improves economy and reduces engine loading, particularly around the 2000rpm and 4000rpm points where the intake runners change length to further improve torque/efficiency/power.




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Originally Posted by rwdkev View Post
When you get as old as myself and Dave (sorry Dave lol) your priorities change.....

Having said that, we've both run a 760 V6 and we never had the choice with that particular engine - it was the only one used in the 700/900 range that was never available with a manual gearbox at any point.


Mark is actually 4 years older than me Kev...............

I believe in other countries a manual was an option, just not here in the UK.

For anyone really intent on converting a 760 V6 to manual, assuming they could find a donor car, the Peugeot 505 V6 STi, 604 V6 GTi, Talbot Tagora V6 and maybe a Citroen or two would yield the drivetrain parts. Pedal box etc would have to come from other 7/9xx cars though.

That said i can't understand why anyone would want to...............




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Originally Posted by Volvoluke View Post
Thanks for the replies. Yes Dave I tried your technique and it works very well, fluid is now ruby red and the gearbox functions perfectly. Regarding a manual box I have considered this but it seems more work than I can be dealing with at the moment. Life has really been turned upside down for our family in 2020 and continues into 2021... I was hoping by buying this used box I have some form of safety net for when or hopefully if the current one fails.
It sounds as if it would be ok fitment wise. Or that's the vibe I'm getting anyway
A manual conversion is possible in a weekend if you have all the parts and everything goes well. That said i'd rather just change an auto box instead!
Also have you considered the crank pulley as being a source of your whizzy/buzzy noise? Often the rubber damper between the front and rear halves of the pulley deforms and causes an imbalance which creates a strange noise. Also try slipping the belts off the alternator and PAS pumps to isolate those as sources of the noise.
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Old Jan 15th, 2021, 15:46   #16
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You should never give away a ladies age Dave
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Old Jan 15th, 2021, 16:18   #17
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You should never give away a ladies age Dave
I haven't given anyones age away Mark!
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Old Jan 15th, 2021, 16:29   #18
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I haven't given anyones age away Mark!
Thats right.....you are 21 and I'm 25
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Old Jan 15th, 2021, 21:48   #19
volvo always
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I'm 41 and I wouldn't want a manual 940. Like my Auto 940. Also have an auto Auris Hybrid. CVT noisy in hard acceleration, but quiet once up to speed.

Had autos for 15 years now, except a Lexus IS 220D 6 speed manual a few years ago now. Far prefer auto in traffic!

Drove 340, 740, Toyota Corolla, manual prior to auto. Then looked for a Volvo and Sister found me a 1989 240GLT auto estate for £250. Stayed auto since.

My Dad said get an auto as less chance of being ragged as automatically changes up!

James
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Old Jan 15th, 2021, 22:21   #20
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Thats right.....you are 21 and I'm 25
Pfff 25 at heart hey Mark 😋😂
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