v70 transmission question

v70guy · Post by **v70guy** » 27 May 2011, 20:12

I have a 2000 V70, FWD that has the AW55-50sn tranny. apparently dex/mercon was used instead of the specialty fluid and so, 1 tranny lunched. I came across a trans # AW50-42LE and when I went to do the swap today, i found that the donor trans doesnt have the little 8-10 wire pigtale connector that's to the right of the main transmission plug/harness. now, I learned that the donor trans is a 4sp whereas the one in the car is a 5. (its actually my dad's car and he's cheap). he wants to put the trans in regardless if the wiring doesnt match up or the # of forward speeds is off

whatever the case, would it be possible for this swap to take place and if so, what do you ppl think will NOT function/happen when this extra pigtail doesn't get plugged in when the junk trans is installed?
Can I possibly swap some of this wiring over to the new junk tranny?

the car's been sitting literally for YEARS and he's had this tranny for months. i started the swap not knowing ANY of the above regarding part #'s, and such, so thanx mat's volvo site for the info!!!

Post by **jimmy57** » 27 May 2011, 20:32

No way to make this work. The 5 speed has double the solenoids and shifts using a completely different strategy. The trans computer ( TCM) can't be swapped between a 99 that uses 4 speed with non-turbo and the 2000 as some component differences make for software differences and there is no software fix to make the 4 speed fit where a 5 speed lived.
You could get a book and learn to overhaul the 5 speed..........
The transmission will not do much but stay in 3rd gear and burn up if it is not connected to a compatible working TCM, a TCM that can talk the to the ECM.
I wish I had good news.............

v70guy · Post by **v70guy** » 27 May 2011, 21:06

TY!!!!! now just gotta show my cheap dad this post

either way, tranny's coming out tomorrow and basically I'd like to if there are any "special tools" required to do so-(don't want any suprises, you know). I can get a socket for the axle nut(what size is it?), but besides that, I'm not sure what I'll need.
I've removed plenty of trannys before, just never a 2000 volvo v70.
thanx!!!

Post by **JRL** » 27 May 2011, 21:39

Good luck
What's the rush?
You don't have the right tranny to put back in.
And seriously, don't try this, IT WILL NOT WORK

v70guy · Post by **v70guy** » 28 May 2011, 00:02

im NOT going to attempt the swap- its just that my dad wants the tranny out at least so, well he wants the tranny out:(
i agree 100% about the stupidity of even making such an attempt, i only wanted to confirm what i already suspected. to be honest, im suprised the car started up and ran because the car is literally a rats' nest-it was sitting in a field the last 2-3 years. rat poo everywhere and im suprised that no wires are chewed up!!! (interior smells funny, though) anyways, HE's the one in a rush so really, all i need to kno is exactly what size the axle nut is so i can be prepared. im actually removing the trans near the field it was at, so basicaly its gonna be hand tools n grunt work. is an engine hoist absolutely necessary, can i be lazy and leave the axles in the hubs n just undo the LCA's? mind u, i have the tools, but im forced to do it shade tree style cuz of where the car is at:
in dirt,on a hill, literally under a shade treeLOL.

Post by **JRL** » 28 May 2011, 05:27

Well good luck with this
I forget the size but the axle nut is a big one!
Buy a lot of PB Blaster, you're going to need it