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Engine Specific Info and Questions => IDI Engine => Topic started by: dokarex on April 02, 2009, 12:05:30 pm

Title: Tranny
Post by: dokarex on April 02, 2009, 12:05:30 pm

What would happen if I go from an ABF tranny to a DU tranny in my Vanagon?
091/1 091/1 091/1  
ID character  DU
For engine 1.9L  
 
Year < 84.7

1. gear3.78  
2. gear 2.06  
3. gear 1.23  
4. gear 0.85  
Revers 3.67  
Transaxle 4.86

ABF091/1 091/1 091/1
ID character ABF
For engine 1.6L
Fuel Diesel
Year  84.8  
1. gear 3.78
2. gear 2.06
3. gear 1.23
4. gear 0.85
Revers 3.67
Transaxle 5.83

Title: Tranny
Post by: zukgod1 on April 02, 2009, 12:06:42 pm

EDIT!!

I had read it backwards as to which trans you were changing from.


Using a 205/70r14 tire;
The top trans would have your engine spinning @ 3000 rpm @ 54 mph.

The lower trans would be 3000 rpm and 45 mph.

Title: Tranny
Post by: dokarex on April 02, 2009, 12:08:31 pm

Wouldn't the rpms be lower with the DU instead of the ABF along with a higher top end?

Title: Tranny
Post by: zukgod1 on April 02, 2009, 12:10:58 pm

Quote from: "dokarex"

Wouldn't the rpms be lower with the DU instead of the ABF along with a higher top end?

[size=0]No,

In gears the higher # is lower gearing. So a 5.89 Ring and pinion would spin the engine faster than a Ring and pinion of say 4.89.

The lower the # the slower the engine will spin.[/size]

Oh hell!!

Yes I read that backwards!

The DU will have lower RPM's.

Title: Tranny
Post by: the caveman on April 02, 2009, 12:40:25 pm

I did exactly that;it's a 5 speed, but with the same 5th and R&P. At 3600 rpms,i was going 88 kph. When i changed it i can go 102 with stock size tires, and 107 with the 195/65/16's in summer.

Title: Tranny
Post by: dokarex on April 02, 2009, 01:51:19 pm

I did exactly that;it's a 5 speed, but with the same 5th and R&P. At 3600 rpms,i was going 88 kph. When i changed it i can go 102 with stock size tires, and 107 with the 195/65/16's in summer.

You put in a 5 speed or are you telling me the DU is a 5 speed.
What is your top speed 102 with stock?
I already top out at 102 with the ABF and stock tires(1.9TD)

Title: Tranny
Post by: the caveman on April 02, 2009, 02:52:19 pm

It isn't a DU .It's a syncro trans and diff but without the 4wd output. It's just the ratios are the same as a DU.
The speeds i mention aren't top speed ,but cruising speeds.Top spedd befroe was maybe 110. I haven't even tried with the engine i have now, maybe 125 if i plug my ears and don't look at the tach.