Bus 3 rib tranny to 2.0 engine

[hushcar]

Hello, I believe I can put a later bus engine, like a 2.0 liter from a 78 Bus into an early bay, 1971 if I change the bell housing? Is that true and if so what Bell housing year do I need to use? Thanks ahead!

[busdaddy]

You'd be better off changing the flywheel, a 210mm type 4 will fit your existing trans, you'll have to put a pilot bearing in the flywheel to reach that shorter type 1 input shaft though.

But unless you plan on running giant tires you'll be super disappointed with the performance, the gear ratios will top out long after that long stroke 2l stops making torque and the shift points will place the next gear in a range between best power speeds. Good for drag racing, not so much for climbing long mountain passes.
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[SGKent]

if your intent is to have a bus that will be enjoyable, stay with the type 1 engine and put a little larger cylinders in it like for a 1776. If your intent is to make a lot of power and have a handful of modifications and expenses, put in a type 4 2L with an 091 six rib transmission. If your intent is to flip some bus you found without an engine, just clean it up and flip it as is.
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[aeromech]

Good luck. You’ll need it
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Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
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Capable of leaping tall buildings in a single bound

[timvw7476]

the early 002 ratios really make 1st a 'granny gear' once you bolt even a 1800 Type IV to it. Along with 16mpg. A 2.0L would pull down 15mpg at best. If that's your thing, & you think you need a VW bus with a granny low for wood hauling or tow work . Wait, that's crazy. 091 usually provides up to 23+ with a 2.0L.
VW matched the ratios/final drive really well for all around use.

[aeromech]

In addition, the later 091 transmission has much stronger workings that are built for the 2.0 size engine. So if you go with the 002 you’ll suffer reliability as well as drivability and economy
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[busman78]

If your making that 2.0L into and upright engine via a DTM or other option you will have a screamer, the 2.0L or any of the T4 will out torque your stock T1. But if you are going to try and stuff the T4 with all the tin and cooling in stock form go buy a 72 or later bay.

And to answer your question, get a 210mm flywheel and clutch set, since you have a 71 now your TO bearing will work.

[Wildthings]

I have an 002 coupled with an 1800 in my '77. The 002 has a lower first gear so that I didn't have to use the clutch as much on really rough roads, and I had 4th gear upped a bit so that combined with 27x8.5R14 tires I get about the same highway rpm as a stock 091 would give. I have been running this combo for 6 or 7 years now and it is doing me well.

[nemobuscaptain]

[RalphWiggam]

[busman78]

From experience I can say yes it will. Just consider the T1 crowd with over 2L engines cranking out lots of HP and they use a 200mm. The 210 pressure plate will be more than enough.

[Wildthings]

[airschooled]

[Xevin]