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View Full Version : Metal Shavings in Tranny Fluid. Options?



Militant-Grunt
05-04-2008, 10:44 PM
Well this explains it all =/. If you guys read my previous thread about the mysterious crunching. On the lift it does not happen, but a dreadful noise coming from the center portion of the transmission is not welcoming. (Area 3-4 inches behind where the axles attach).

What are my options?
Is fitting a 6spd Tranny difficult? Whats needed? A4 / S4 6spd differences?
Are 02+ A4 6spd's strong?

I guess E-Town run killed it. It runs, just crunches a lot and makes noise in 1st and a teeny bit in 2nd. That and every time I brake or engage a gear i hear a crunch noise.

Siena
05-05-2008, 12:31 AM
01E 6 speed conversion isn't difficult.

You'll need:

1) 01E 6-speed transmission
2) B5 S4 / RS4 mounts
3) B5 6-speed shift mechanism
4) B5 6-speed clutch slave cylinder
5) B5 S4 6-speed propshaft, otherwise, shorten yours
6) B5 FWD manual V6 / 1.8T axle shafts, with 108mm inner CV joints. Quattro V6 and 1.8T have 100mm CV's. Or, replace the 01E flanges with 100mm ones from an 016 manual tranny.

I'd get rid of the DMF, and go for a single-mass one. If you retain DMF, you'll need to run an engine-to-tranny spacer, off an European S2 ABY.

Not a hard job, and can be carried out in half a day on your driveway, or about 10 hours with a ramp.

I'm doing the same conversion on my '96 A4 2,6L V6 QS.

pac1085
05-05-2008, 07:41 AM
01E 6 speed conversion isn't difficult.

You'll need:

1) 01E 6-speed transmission
2) B5 S4 / RS4 mounts
3) B5 6-speed shift mechanism
4) B5 6-speed clutch slave cylinder
5) B5 S4 6-speed propshaft, otherwise, shorten yours
6) B5 FWD manual V6 / 1.8T axle shafts, with 108mm inner CV joints. Quattro V6 and 1.8T have 100mm CV's. Or, replace the 01E flanges with 100mm ones from an 016 manual tranny.

I'd get rid of the DMF, and go for a single-mass one. If you retain DMF, you'll need to run an engine-to-tranny spacer, off an European S2 ABY.

Not a hard job, and can be carried out in half a day on your driveway, or about 10 hours with a ramp.

I'm doing the same conversion on my '96 A4 2,6L V6 QS.

You forgot about the S4 rear end which has a different final drive than the a4's (4.111 on the s4 vs 3.889 on the a4)

If you have a 1.8t you need to either mod the subframe or replace it because it has the wrong mount on the left side.

Militant-Grunt
05-05-2008, 08:45 AM
Yeeeeah thats a lot of work, forget that.

Obviously theres also the 2.8 option, but I don't want to decrease my acceleration. Gas mileage would be nice though.

pac1085
05-05-2008, 08:54 AM
I have the 2.8 and I don't think you'll notice any sort of decrease in acceleration.

Militant-Grunt
05-05-2008, 08:57 AM
I have the 2.8 and I don't think you'll notice any sort of decrease in acceleration.

In a thread I was reading somewhere Mike hood shaved off .7 sec at the 1/4 mile strip by using a 1.8t tranny over a 2.8. Obviously theres something in that.

AudiRacerS4
05-05-2008, 09:17 AM
In a thread I was reading somewhere Mike hood shaved off .7 sec at the 1/4 mile strip by using a 1.8t tranny over a 2.8. Obviously theres something in that.

because the 2.8 trans did not let him utilize his powerband correctly

317ssayzarc
05-05-2008, 09:54 AM
In a thread I was reading somewhere Mike hood shaved off .7 sec at the 1/4 mile strip by using a 1.8t tranny over a 2.8. Obviously theres something in that.

unless you plan on running a 35r with a .82 AR, youre not going to see anything like that... different gear ratios for different powerbands... depending on the setup, the 2.8 may allow some setups to hold a gear longer which is big, just bc mike hoooodddd did it doesnt mean everyone can lol

Militant-Grunt
05-05-2008, 09:54 AM
Well I am planning 2.0 and Gt3071 and at least 8500k rev, hence Im wondering how well will a 2.8 work with that.

317ssayzarc
05-05-2008, 09:59 AM
just fine... my 3071 makes 5 psi by 3000 rpms lol

Militant-Grunt
05-05-2008, 10:08 AM
just fine... my 3071 makes 5 psi by 3000 rpms lol

I have not seen you on Aim in the longest time, where'd you disappear off to?

We gotta talk. [wrench]

onemoremile
05-05-2008, 10:33 AM
The 2.8 gears are roughly 6-10% longer than those in the 1.8 box. That means you put roughly 6-10% less torque on the road but can hold the gear 6-10% longer.

If for the sake of example, a car averaged 100 wtq in gear and could hit 100 mph at the top of that gear and was now modified with a gear 10% longer it would now average 91 wtq and hit 110 mph.

Mike's reason to swap the gearbox had nothing to do with power or anything else other than trap speed. If the long box is putting you in the bottom of fourth gear and a short box puts you in the middle then the extra shift was worth it. He could have also gone with a longer box (assuming one was easily available) and held third gear through the traps but that would also assume the torque curve was wide enough to allow that.

I run into this same problem on the track with my K04 and 1.8 box. On Gingerman's back straight I hit the rev limiter for a couple seconds before getting on the brakes for the next corner. If I short shift to fourth it doesn't yield any higher max speed and now I've got to deal with rev-matching a shift back down to the bottom of third for corner exit. If I had a 2.8 box I could just hold third and not worry about it.
Now comes the curveballs. More power puts me well into fourth with either box. Even the K04 and track tires puts me into fourth since entrance speeds are higher and brake zones are later. The more I think about it the more it makes sense to stay with the 1.8 box with a 3071 or 3076. It would take a lot of power to max fourth on a 2.8 box on this particular track.

onemoremile
05-05-2008, 10:35 AM
The other thing to consider is how you drive the car and how high you rev it. A 2.8 box has gears spread a little farther apart so the revs land a little lower after shifting. The 1.8 box has closer ratios that are well suited for a tight peaky powerband.

Militant-Grunt
05-05-2008, 10:42 AM
The other thing to consider is how you drive the car and how high you rev it. A 2.8 box has gears spread a little farther apart so the revs land a little lower after shifting. The 1.8 box has closer ratios that are well suited for a tight peaky powerband.

Then from what I gather a 1.8t box will be better suited for my purposes. Thanks.

Don Supreme
05-05-2008, 11:11 AM
1.8 Ftw...

317ssayzarc
05-05-2008, 01:30 PM
I have not seen you on Aim in the longest time, where'd you disappear off to?

We gotta talk. [wrench]

Well 50+ hrs of work, 30 hrs of school and pullgn the motor out of my car makes my week a bit tight on time lol... Shoot me a pm and we can phone chat a bit when I'm driving to/from school or on break...

And btw, I love my 2.8 tranny, its awesome... Not sure how it'll do with a 35r or bigger by the end of this year but I'll be sure to report back... Plus I have a spare 1.8t tranny laying around if I want to switch lol

Siena
05-05-2008, 04:09 PM
Luckily, my 2,6L has a 4,111 final drive.

mike-2ptzero
05-05-2008, 08:47 PM
Mike's reason to swap the gearbox had nothing to do with power or anything else other than trap speed. If the long box is putting you in the bottom of fourth gear and a short box puts you in the middle then the extra shift was worth it. He could have also gone with a longer box (assuming one was easily available) and held third gear through the traps but that would also assume the torque curve was wide enough to allow that.

.

A taller gearing wouldn't have helped seeing that it would mean I would use less of my hp to get down the track. Just look at the pro stock cars on NHRA, they run the 1/4 mile in 6 seconds but still use 5 gears. But yes one of the big reasons I changed back to the 1.8 gear box was because it would put me right at my peak hp as I hit the finish line which is exactly what you want for drag racing. I could have also just put on tires that were smaller allowing the 2.8 gearing to be decreased, then put on taller tires for the street.


The shorter gearing also decreased the amount of tire spin I get while launching since the wheel speed is decreased with the shorter gearing in the 1.8t.