Changing gearbox

[zzdiesel]

So, having problems with my FHN gearbox, long story, changing to an EEN tranny. What problems will I be facing? Will the ECM need to be recoded due to the differant gear ratios? It has a Malone tune. Also what pilot bearing are people using?

 

[caffeine]

The B7 2.0T pilot bearing is a good choice for a BHW as it's longer than the B5 1.8T one.

 

[CantWrite]

Cant help at all, but I bought mine EEN swapped and I see 2800 rpm at around 80 mph with stock size tires.

good luck with the swap

 

[PickleRick]

Once you get it in see if the cruise control works. There's I believe a 10% error allowed by the ECU on the RPM vs speed. If it does work no need for a reflash. If it doesn't then it's time to reflash if you want cruise control

 

[zzdiesel]

Caffiene, do you have a part number for the pilot bearing?

 

[caffeine]

Caffiene, do you have a part number for the pilot bearing?

06B105313D

 

[zzdiesel]

Can anybody tell me what the FHN does for rpm at 80 mph with stock tires? I am wondering if it is within thenten % that pickle mentioned. Maybe it would have to within 5%, 5 plus or minus making ten.

 

[CantWrite]

Looking at old threads, a conversation between VWZIPS and 50harleyrider showed:

EEN: 2700 rpm @ 80mph (3.70 R&P)
FHN: 2450 rpm @ 80mph (3.44 R&P....?)

so right around that 10%, so prolly too close to call without installing and checking to see if cruise works as mentioned above. I’d error on the side of it won’t......

 

[zzdiesel]

3.7 minus 3.44 over 3.44 times 100 equals 7.55%

 

[CantWrite]

3.7 minus 3.44 over 3.44 times 100 equals 7.55%

Sweet!! Your math must be better!! Not sure if 5th gear is the same....

I just did 2450/2700 = .9 - 1.0 = .1 or 10%

snark remark is not my intention if it’s taken that way.

 

[zzdiesel]

Further comparison, 5th times final drive.

Fhn---3.44x .686= 2.359
EEN---3.70x.683= 2.527

Percent differance is 7.1% So maybe