Thread: Info on P6 Diffs, and ratios

Originally Posted by justinc

in 1984 to 1985 the Torquflyte 727 was fitted behind the RRC 3.5 in the Rangie, you'll just need to find a 2wd extension housing for the TF727. I don't think the bellhousing and adapter will fit easily in the P6b tunnel though...

Still, it'll be unbreakable THEN...

JC

Case is from an AMC not chrysler, so fitting a 2wd box gets more difficult

Oh, beefed up BW35

The BW35 and its derivatives would see half a million km between rebuilds when running behind the 3.9 litre Ford fuel injected engine in the EA Falcon taxis, and even then the bands showed no discernable wear so would be refitted for another half million km stint. Most people won't do that sort of distance in one car in a lifetime, so that seems pretty good to me.

Anything can last and anything can be broken, it just depends upon how it is treated.

Ron.

Originally Posted by RoverP6B

The BW35 and its derivatives would see half a million km between rebuilds when running behind the 3.9 litre Ford fuel injected engine in the EA Falcon taxis, and even then the bands showed no discernable wear so would be refitted for another half million km stint. Most people won't do that sort of distance in one car in a lifetime, so that seems pretty good to me.

Anything can last and anything can be broken, it just depends upon how it is treated.

Ron.

How did I know you'd pop up Ron

My old boy used to exchange them less than every 60,000 miles in his xb fairmont, he did 300+ thousand miles in 20 odd years, on gas, with a piddly little converter, it literally couldn't slip a wheel on gravel

Oh, bw35 was superseded in the xf, so your telling porkies

rovercare wrote,...

Oh, bw35 was superseded in the xf, so your telling porkies

Hi rovercare,

That's the deratives that I mentioned in my post above.... The BW35 became the BW40 and then finally the M51 which was the one in the EA Falcon.

In a Rover P6 there isn't really a great deal of choice as far as transmissions go. The ZF 2HP22 is an option but there is a fair amount of mods to do and rebuilding the ZF will cost considerably more.

The Australian BW35 and the improved parts that appeared in the XF Falcon onwards makes the transmission far more robust that it was originally and that is a good thing.

Mine was upgraded two years ago and it is running beautifully, handling the power of my 4.6 without a problem. I do treat it with respect as I have always done with my Rover which now has over 400,000km on the clock.

Ron.

Originally Posted by RoverP6B

rovercare wrote,...

Hi rovercare,

That's the deratives that I mentioned in my post above.... The BW35 became the BW40 and then finally the M51 which was the one in the EA Falcon.

In a Rover P6 there isn't really a great deal of choice as far as transmissions go. The ZF 2HP22 is an option but there is a fair amount of mods to do and rebuilding the ZF will cost considerably more.

The Australian BW35 and the improved parts that appeared in the XF Falcon onwards makes the transmission far more robust that it was originally and that is a good thing.

Mine was upgraded two years ago and it is running beautifully, handling the power of my 4.6 without a problem. I do treat it with respect as I have always done with my Rover which now has over 400,000km on the clock.

Ron.

That is correct, they were bettered than a 35

Still, finding a bellhousing from a rangie that has had a c4 fitted I think would be a far better proposition, they are a far better trans and cheaply built to a reasonable standard

So at what kilometers hat your bw been rebuilt? It hasn't travelled 400k

rovercare wrote,...

So at what kilometers hat your bw been rebuilt? It hasn't travelled 400k

Up until the last rebuild in 2009 when it received the full upgrade to M51 standard, typically 110,000km a time which was very poor indeed according to the transmission specialist who undertook the upgrade. He said the standard BW35 parts were on the limit with the 3.5 litre Rover V8, but the 4.6 made life unbearable for it. Now with a full upgrade I am hopeful of a much longer run this time around!

Ron.

Originally Posted by RoverP6B

rovercare wrote,...

Up until the last rebuild in 2009 when it received the full upgrade to M51 standard, typically 110,000km a time which was very poor indeed according to the transmission specialist who undertook the upgrade. He said the standard BW35 parts were on the limit with the 3.5 litre Rover V8, but the 4.6 made life unbearable for it. Now with a full upgrade I am hopeful of a much longer run this time around!

Ron.

So your actually agreeing with the fact they suck! 110,000 kms it's close to 60,000 miles Ron, even your trans builder agrees