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TDI Conversions Discussions on converting non TDIs into TDIS. More general items can be answered better in other sections. This is ideal for issues that don't have an overlap and are very special to swaping engines.

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Old December 3rd, 2018, 14:16   #16
jmodge
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http://www.cpttransmission.com/tech_tvcable.htm

Check the tech 2 link in the artical. Shows the dimensions for setting up a tv cable bracket.
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Old December 3rd, 2018, 19:57   #17
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Manual shift control (manual valve body) for the non-electronic transmissions is not a problem, these transmissions are commonly used in drag racing and it's done all the time for that. Doesn't fix the line pressure headache, though. I think it will still want the TV hooked up (and correct! - looks like it's fussy) to get it to shift right, and at that point, you might as well just let it do its own shifting. Wrongly chosen manual shift (you know it's going to happen!) plus wrong line pressure looks like it could easily cook something.

It would sure help if the original poster would chime in and explain what it is that they are trying to do.
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Old December 4th, 2018, 08:28   #18
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Yeah, an update by op would be nice. We may hear in time. Nice topic and food for thought at any rate.
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Old December 6th, 2018, 02:33   #19
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I have been running a 4l60e on my TDI for almost 3 years now. It is a great match for the torque/power. I do not think I would be happy with a th350 as it's nice to have the overdrive gear. Using USShift to control it. Using a custom built torque converter. We have a guy that builds them locally. I have have lockup set in 2nd gear and up. I can chug around town in 2nd or 3rd gear as low as 1350 rpm with lockup engaged pulling good torque and the transmission behaves really nice. There is a bit too much concern in the posts above.
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Old December 6th, 2018, 04:27   #20
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Good info, thanks for posting that
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Old December 6th, 2018, 06:58   #21
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I agree 100% that the 4l60e would be a better on road tranny but if i were building a yj, fj40 or similar short wheel base off road rig and needed a cheap, strong, compact transmission the th350 would be a go to. I have always been impartial to stick shifts but the automatics are far better for off road/rock climbing duty especially if one must use the brake and throttle at the same time. A hand throttle in a TBW set up would take some for thought and even then many times on rocks you need both hands on the wheel. Pre power steering rigs are 100% 2 handed on rocks. This is important to remember due to many emissions regulated areas requiring diesel swapped vehicles be past a certain age (usually 70s)

The drive shaft angle for a dual boxes on a SWB vehicle with a 4l60e would leave much to be desired and in many set ups impossible.

But a 4l60e would allow me to drive my off road toy 85mph to the Moab...some 5 day trek, beat the crap out of it on the rocks and IF i dont destroy it i can drive all the way back home...if she'll fit (that's what she said)
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Old December 12th, 2018, 19:15   #22
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I will blame my wanting the automatic on my wife to whom I am married. Her bad left knee does not allow her to operate a clutch. I'm building an open hood rat rod, and have a 2002 1.9 motor pulled from a Jetta I bought back from the insurance company for $290. The rat rod WAS getting an I6 out of a '76 Firebird, but this tdi sounds and looks MUCH cooler. Really any automatic trans would be fine, I just happen to have a lockup th350 on hand. I could sell the 350 easily and put the $150 towards the correct trans. FWIW, the 1.9 is not getting built, and it will be stripped down. No a/c, no pb, no ps, no egr. The stock 90hp will be enough for the 1700 lb car. I have not sent the computer off for the deletes; that will happen after the holidays. Any and all ideas are welcome.
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Old December 13th, 2018, 05:14   #23
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With a build like the you should be able to get away with a non overdrive trans. Gear options are near unlimited in car axles. Dodge gen 1 Cummins ran a non overdrive trans with a 307 rear end and it worked fine.
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Old December 13th, 2018, 06:09   #24
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The adapter that fits the th350 will work on the 700r4/460le so future upgrade on the tranny is always there.

Sounds like a fun build. You'll spend as much on a stand alone computer for the 4l60e as you will om the transmission itsself.

I used witbread for my tuning (malone) there are sevral others here that do that as well and they are more active on the forum.
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Old December 13th, 2018, 16:52   #25
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OK now we are getting somewhere! If the car only weighs 1700 lbs then it won't need deep gearing for starting off from a stop, and if it has terrible aerodynamics (which is likely) then it won't want a tall top gear, and it's not likely something that you want to go exploring autobahn top speeds with.

Danger: Calculations ...

If your tires are 28" tall (guess) then they will be doing 720 revs per mile, i.e. 720 rpm. Multiply that by final drive ratio to get revs at 60 mph.

If you target 2400 rpm at 60 mph the car will still do 90 mph if you want to ... probably fast enough for what you are talking about. That would need a final drive ratio somewhere near 3.33:1 so pick something close to that or maybe a smidge lower.

The drive force in top gear at stock 155-ish lb.ft, assumed 85% drivetrain efficiency, 3.33:1 final drive, 28" tall wheels will be 376 lbs. In first gear 2.52:1 it will be 948 lbs, enough to accelerate at close to half a "g" in that light car. Starting off from a stop it would be higher due to torque converter multiplication. 4000 rpm in 1st gear would be around 40 mph not counting torque converter slippage (so in reality the 1-2 shift would be a little earlier). It will carry 2nd (1.52:1) to around 60 mph.

Won't be a barn burner, but in such a light vehicle, it'll do.

The lack of a vacuum signal to the vac modulator remains a nuisance, unless you install a full manual valve body.
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Old December 14th, 2018, 04:20   #26
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I'm not sure about the th350 but I know the th400 can have it's vacuum modulator replaced with a manual one. I bought a Cummins 3.9 out of a bread truck and it had a manual modulator with a control rod going to the throttle.
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