What's the best rearend (Diff) for M60 swap?

[flyboyx]

i was at the junk yard yesterday. there was a 96 540 auto there. the diff was 2.81 lsd if i recall. in contrast, you can find a 2.79 in the e30 style housing really easily.

[bongo78]

Bought a S2.65 from E34 525tds for my build, hope to brake the sound barrier on 6th gear. I do hate high rpm on the highway :)

[MonkeyMadness]

This is awesome.
Getting info like this from all of you before hand is priceless.
I just picked up a*300mm.de swap brackets for the M60 including the optional 20mm sub-frame spacers and extended 10.9 grade bolts.
My son is so frecking excited. the 2.93 seems to be our best bet for the direction were going in.
Now on the hunt for a good donor car in the area..
Wooo this is fun!

[Will_NZ]

Just remember that a V8 automatic in the E30 requires fabrication work to the trans tunnel, it's not just a bolt-in affair. The 5 speed automatic is a humongous transmission, even compared to the 6 speed manual, which is a big transmission. The manual transmissions are a much "friendlier" swap... in case you weren't aware.

Garey

Mine is a 5 speed auto, I didnt have to mod the tunnel. It is tight in there though!

I also use a 2.93 LSD, it cruises beautifully on the highway with that ratio.

[DDF_Dutchie]

Nice topic.

I'm curious about the current v8 builds an diff/gear setup.
Like if a 2.xx diff with 6 speed still has crazy torque feelin.

[The Dark Side of Will]

Good.... :pimp:

What my boys want my boys get. They do what I need them to do and they earn it.
That being said Brogan (my oldest) just graduated Navy Boot camp with Honors. He wants a v8 Auto Swap. Plus He's also paying half..
He earned it...

Jenson my youngest 3 next month, All he ever want to do is ride in "Yellow"
my Lotus Elise. So if he's a good boy, that what he gets!

Congratulations to him!

Here's my take on the Autotragic swap:

I *think* that the 5HP24 (BMW nomenclature: A5S440Z) and 4HP22 have the same pattern mounting the transmission to the bellhousing.

Get the 5HP24 bellhousing and mate up a 4HP22 to it. The 4HP22 can be built to handle the V8. That way you don't have the extra work involved in fitting the larger transmission. Also, the 4HP22's taller first gear will work better with the high torque and limited traction that an E30 V8 will have.

However, the bellhousing interface commonality remains subject to verification...

[MonkeyMadness]

I am personally offended! ;)

Good.... :pimp:

What my boys want my boys get. They do what I need them to do and they earn it.
That being said Brogan (my oldest) just graduated Navy Boot camp with Honors. He wants a v8 Auto Swap. Plus He's also paying half..
He earned it...

Jenson my youngest 3 next month, All he ever want to do is ride in "Yellow"
my Lotus Elise. So if he's a good boy, that what he gets!

[iamsam]

Cause that's what my son wants... is this an issue?

I am personally offended! ;)

Tell your son to want a manual trans, it would be easier and more robust. That said, I would have sold you my auto trans in a heartbeat that I got from my donor car, but I scrapped it.

[Jonsku]

Just remember that a V8 automatic in the E30 requires fabrication work to the trans tunnel, it's not just a bolt-in affair. The 5 speed automatic is a humongous transmission, even compared to the 6 speed manual, which is a big transmission. The manual transmissions are a much "friendlier" swap... in case you weren't aware.

Garey

I'll second this. That 5 speed auto is a monster!!

Oh yes, it is BIG! (here's a comparison pic between M20 + auto and M60 + ZF 5HP30: http://v8cabrio.kuvat.fi/kuvat/02_M2...+vs+M60_up.JPG ). The autobox itself weights around 120..130kg so it needs to have proper transmission mount :)


Actually the autobox will drop into the gearbox tunnel quite well, you need to massage the walls a bit with a sledgehammer - but surprisingly small amount anyhow..


Here you can find pictures on my latest E30 V8 swap for a friend (cabrio with autobox, AC, cruise, electric seats etc..); http://v8cabrio.kuvat.fi/#/kuvat/

[dirty30]

Just remember that a V8 automatic in the E30 requires fabrication work to the trans tunnel, it's not just a bolt-in affair. The 5 speed automatic is a humongous transmission, even compared to the 6 speed manual, which is a big transmission. The manual transmissions are a much "friendlier" swap... in case you weren't aware.

Garey

I'll second this. That 5 speed auto is a monster!!

[robiniscool]

Got an extra TPS, purge valve, or intake temp sensor?

yes but off a m62 obd ii manifold and thats drive by wire =(

[JGood]

i got random m60 parts from my swap, just hit me up, who knows maybe ill have something you need

Got an extra TPS, purge valve, or intake temp sensor?

[robiniscool]

i got random m60 parts from my swap, just hit me up, who knows maybe ill have something you need

[bmwmech1]

Cause that's what my son wants... is this an issue?

Just remember that a V8 automatic in the E30 requires fabrication work to the trans tunnel, it's not just a bolt-in affair. The 5 speed automatic is a humongous transmission, even compared to the 6 speed manual, which is a big transmission. The manual transmissions are a much "friendlier" swap... in case you weren't aware.

Garey

[JGood]

There is no 'best'. This is sort of a subjective question, so it's a matter of personal preference. Some people like closely spaced gears, some people like longer gears. Some people like being up high in the RPM's on the highway, others prefer the lowest RPM possible. Do you want max MPG on the highway, or max acceleration?

Best way to figure it out is put your numbers into a gear ratio calculator and see what RPM you'll be running in each gear at any given MPH. You'll also be able to see your top speed in each gear, what RPM's you'll be at when you shift at any given RPM, etc...

http://www.f-body.org/gears/

If you are using the 5hp30, here are the ratios:
1st: 3.55
2nd: 2.24
3rd: 1.54
4th: 1.00
5th: 0.79
Rev: 3.68