4r70w , 203/205

[onebadd73]

Anyone run a 4r70w with a 203/205 doubler. I have a 4x4 4r70w and I just picked a 205..I have someone who is selling a 203..will this work with this tranny. My rear end is pushed back 8 inches so driveline length is not a issue..

 

[Yeller]

It's been done and does work. I haven't done it personally so I'm not up on all the details but have run that doubler set up and liked it other than the weight.

 

[nvrstuk]

Like Yeller said, good combo...

I've been running the 4R70W with a KluneV/Atlas for 6 years... I am currently swapping out the 4.3 Atlas for the 205... 4R70W/KluneV/205 fits in there great. I just upgraded the output shaft on the KluneV to chrome moly...

The 203 weighs more than the Klune and takes up more space. I ran the ZF/203/D20 combo for a dozen years....you'll really like the USABLE gearing options with the 203/205...

Appr. weights:
Atlas weights 115# dry (according to AA). 205 weighs 135# dry (weighed it) ... 203 weighs 70# dry (weighed it)

Doubler weight of 203/205 is advertised at 240#

 

[Broncobowsher]

Strongly recommend a support between the 203 and 205. That is a lot of weight AND leverage to hang off the stock explorer tailhousing alone. That tailhousing was only built to handle a single lightweight alloy transfer case.

 

[nvrstuk]

Totally agree on 2 trans mounts with one behind the doubler....on top of that I ran the tail shaft housing support ring on my Atlas since I'd heard of some issues with it hanging out there too. Never an issue with this setup

 

[Yeller]

I've installed several 203/205 combos. I always mounted off the adapter between the 2. Using them abusively with multiple mounts always broke the transmission housing in my experience. In high horse power overly abusive aplications I have made a cradle that suported the trans and doubler setup and a mount on that, but I really can't see 95% of the world needing that.

 

[SpareParts]

I've had good luck with mounting my 203/205 off of the WMS adapter between the two cases.

My new set up I run 2 mounts off of the 205 for the extra support. Been this way for 4 years and I'm pretty hard on it.