Close ratio trans with a diesel?

[JerryGTD]

i would get rid of that junk AVX. i like running 3.67 final drives personally.

just sell the avx to some gasser boy on the whoretex. and buy yourself a real trans. ACN and AGS trans are both very good match to a diesel.

Thanks for your priceless advice, but I want to keep my junk AVX.  I like the greater mechanical advantage of the 4.25 final. I am willing to sacrafice a few miles per gallon for better driveability. 90% of my driving is local stop light to stop light.

[Rabbit on Roids]

thats fine. but i cant think of a worse way to set up a trans, have a nice super tall fifth gear, then negate that with a stupidly low final drive. ill tell you what, ive never had any problem with 3.67 gears in stop and go driving. i personally have never owned a AVX, but ive owned a couple trannys with with 3.94 finals in them, and the only benefit, was i had better engine braking going down hill. other than that, it just sucked. but i guess when you have enough power to use tall gears, then go for it. and i definitely have that power. an eco diesel is underpowered at best. a small turbo mixed with a tiny fuel pump. lol...

[JerryGTD]

i personally have never owned a AVX

Thats fine. I never owned a gasser boy tranny with a 3.67 final.

an eco diesel is underpowered at best. a small turbo mixed with a tiny fuel pump. lol...

What are you doing here? ^ Trolling? lol Lets stick to the subject of transmissions.

[8v-of-fury]

I dunno here guys, the difference between a 4.25 final w/0.71 5th and a 3.67 final w/0.71 5th is a mere 350 RPM at cruising speeds..

Even so the difference between a 3.94 and 4.25 is debatable.. Only 200 RPM difference between 2400 and 2600 RPM.

You say you bought a 4K! YES IMHO the best ratio trans for a power house engine! Take the .71 5th from the FN and swap it in to the 4K, yes the jump from 4th to 5th will be larger it will still be very doable.. and most delectable. Say you shift from 4th to 5th at 60mph at 3800 rpm.. its gonna drop you in to a cruising RPM of 2400 in 5th. As long as you don't drop to 4th at anything over 3500 in 5th I think you will be quite alright.

NOT TO MENTION HOW FUN THAT MONSTER WILL BE IN TOWN! 5th will only be a highway gear like it is meant to be.

Good luck with this. Don't mind Rabbit on Roids..

[NintendoKD]

what kind of power nos. are we talking here? how much Hp's can this tranny handle?  that is, before the tranny goes KABOOM!!!

[rodpaslow]

The last post kind of scares me.  I've been following this and I am going to start, hopefully this weekend, building 1.6 TD with new goodies (pistons, girdle, redone head,etc) will have a T3 boosting it in a 96 Golf with an 020 tranny.  I'm expecting to be getting 20 psi boost (limit it to that).  I don't know what kind of power that will produce - is the tranny able to handle it (3.667 ratio with a .75 5th)

[8v-of-fury]

Smokey Eddy on this board is running a 1.6 stock bottom end with a 1.9 AAZ head, and a T3 boosting its heart out. The fuel is also maxed out. His 020 is holding up just fine for the last year. He romps on it regularly. PM him if you have any questions

[Rabbit on Roids]

So,

I impulse bought myself a 4k GTI trans for $25.  Right now my diesel has an FN in it.

I'm currently running a VNT15 at 25 psi and don't like how tall second is.  The last time I autocrossed it, I would experience loads of lag out of corners in 2nd...it wasn't worth downshifting into first for the few hundred rpm I could get out of it at that speed.  My fear is, though, that the limited rev range of the diesel (mine maxes out at about 5500) would not work well with that transmission.


Any thoughts?

I'm probably going to be ditching the VNT15 in favor of a T3 within a few weeks, as well.

It sounds like your VNT15 is knackered.  If you have a functional vane control and turbo then you should experience no perceptible lag in 2nd unless you have a huge intercooler and oversize intercooler tubing.  Even with oversize intercooler and tubing and with vanes fully open you will experience considerably more lag with a T3.

i have a VNT 17 with wide open vanes, and the only time it lags is right off the line. once its spooled, your good to go. just pulls and pulls. it doesnt even lag bad off the line.

[Rabbit on Roids]

sorry guys, i just hated my close ratio trans once i got a suitable trans with some spread out gears. i used to love my AUG, but then i got an ACN and my love shifted. and diesels have torque, they dont need low finals and close gears to keep them wound up like gassers need.

another thing, you guys all talk about swapping in a high fifth in a close ratio trans, not a good idea. the split between 4th and 5th is a bit long for my tastes in this ACN, and it has as tall of a 4th (.91) as some of the close ratio fifth (.89) gears. if you could take an AUG or something close ratio'd like that, and add a .71 fifth as a sixth gear, now we would have one ***in tranny.

to each their own tho. my opinion is just that, an opinion. i dont care either way who puts what trans in what car. but the longer gears work better with a diesel. and a huge jump from 4th to 5th is far from ideal.

[vanbcguy]

I've got one of the steepest trannies out there - CHD... On the highway it's great, but about 5% of my driving is above 80 km/h.  For the vast majority of the driving I do I'd way rather have a lower ratio trans.  Sure, I can comfortably run the car up to 150 km/h but where the heck do you get to do that?

[gldgti]

I've got one of the steepest trannies out there - CHD... On the highway it's great, but about 5% of my driving is above 80 km/h.  For the vast majority of the driving I do I'd way rather have a lower ratio trans.  Sure, I can comfortably run the car up to 150 km/h but where the heck do you get to do that?

i also have the CHD - i do 90% hiway milage so its great, but around town with my T3 now its a POS (hoping to rectify this soon though, i think i have some lingering turbo issues). Anyway, with the T2 on the aaz all was fine because the car had mountains of low end torque - now thats mostly gone and the CHD isnt ideal anymore for around town.

as for top speed though..... hehehehe :-D

Also I wanted to mention that the later CHD/CHE trans from A3 diesels are very STRONG. Much better than the earlier 5 speeds. If you have big power aspirations, it might be worth looking into finding one.

The only other thing i would vouch about the CHD for is that it does have very nicely spaced gears, all the way form 1st to 5th. if your out on the open road or in the twisties, its a nice gearbox to drive :-)

[NintendoKD]

I've got one of the steepest trannies out there - CHD... On the highway it's great, but about 5% of my driving is above 80 km/h.  For the vast majority of the driving I do I'd way rather have a lower ratio trans.  Sure, I can comfortably run the car up to 150 km/h but where the heck do you get to do that?

i also have the CHD - i do 90% hiway milage so its great, but around town with my T3 now its a POS (hoping to rectify this soon though, i think i have some lingering turbo issues). Anyway, with the T2 on the aaz all was fine because the car had mountains of low end torque - now thats mostly gone and the CHD isnt ideal anymore for around town.

as for top speed though..... hehehehe :-D

Also I wanted to mention that the later CHD/CHE trans from A3 diesels are very STRONG. Much better than the earlier 5 speeds. If you have big power aspirations, it might be worth looking into finding one.

The only other thing i would vouch about the CHD for is that it does have very nicely spaced gears, all the way form 1st to 5th. if your out on the open road or in the twisties, its a nice gearbox to drive :-)

Awesome, I need to find one of these then.  This post has been most informative and helpful.

[Rabbit on Roids]

i think i have a CHE, but i think its off a ABA. are they still stronger trannies than regular 020's? i know this one has the big input shaft and stuff.

[gldgti]

indeed rabbitonroids - the CHE is AFAIK the CHD with the only difference being the larger input shaft diameter. The CHD is found on the AAZ mk3 diesels (i guess is could have come on 1Y engined cars aswell) where the CHE came on later 16V cars.

In my (albeit limited) research of the trans ratios, I am fairly sure that the CHD and CHE have the same gears. I am however certain that the CHD/CHE are very tough.

[Rabbit on Roids]

score... cause im pretty sure i got one. it for sure has a big input shaft.