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ChatGPT solves pinion angle question?
So, as I mentioned in my build thread, I've read many threads on the pinion angle question, but most tend to explain the theory, and not on exactly how to measure it (at least for us newbies).
My question is the how, ie where do I place the angle finder, at least on the TKX, I kind of get it for the diff where the yoke attaches, there is that round surface, but I wasn't sure for the transmission. So, I asked ChatGPT, and I have to say, this sounds plausible
Screenshot 2023-02-06 at 19.10.53.png
Another thread mentioned that the suspension needs to be weighted. Where should I put the jack stands to do this? Also, do I need to simulate the full/final weight of the car (ie body, fuel, passengers)?
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David aka Ducky2009
If you have a solid axle, place the jack stands under the axle itself. If you have IRS, doesn't matter, the center section is stationary.
MK4 Build #9035 Delivered 2/17/17, First Start & Go-Kart 6/2/17, Licensed 9/1/17
Paint - Lightning Blue Metallic, No Hood Scoop, No Stripes
Gen 2 Coyote Engine & TKO-600. Solid Axle, 8.8-3.55, Power Steering, Power Brakes, Dual Roll Bars
Heater and Glove Box, Drop Trunk, Wipers, Radio, FFR Vintage Gauges, Custom Dash
Build Thread:
http://thefactoryfiveforum.com/showt...MK4-Build-9035
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Originally Posted by
Ducky2009
If you have a solid axle, place the jack stands under the axle itself. If you have IRS, doesn't matter, the center section is stationary.
I do have IRS. Does that mean I can just leave it with jack stands under the 4" round tubes?
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Not a waxer
IRS need not have the suspension loaded or ride height set. Forget about finding a suitable surface on the transmission; easy peasy method is to place the angle finder on the vertical surface of the pinion flange on the differential and on the vertical surface of engine’s crankshaft damper/pulley and compare the difference to determine your pinion angle.
Jeff
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Senior Member
I'm just surprised you managed to get a spot in line to ask it a question.
Matt
My build thread
here
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Senior Member
Tremec has a phone app that walks you through it using the angle feature of your phone. Like Jeff said straight edge on the crank pulley and pinion flange. In your case raise or lower trans to achieve your goal angle of not more than 3 degrees.
33 Hot Rod Stage 1, Gen.2 ordered 11/11/2021 started June 12, 2022, LS3 E-Rod crate engine, Tremec TKX, 8.8 WITH 3.55 Ratio and limited slip with 31 spline axles.17X8 and18x10 Race Star wheels wrapped in Conti Extreme contact DWS tires, Mustang Cobra brakes all around. Electric PS and AC. Hard top, electric windows and bike fenders. First Start 5/31/2023. Go-Kart 6/2/2023.
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Senior Member
So you would believe something that ChatGPT gave an answer to? It's a computer generated text writer, that has no knowledge of what you are asking. Proof is in the fact that it said use a degree wheel and a dial indicator.
Mrk III, 331 stroker, Borla stack injection, T5, 3:55 IRS, Power steering and brakes. Kleiner body & paint
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Originally Posted by
rich grsc
So you would believe something that ChatGPT gave an answer to? It's a computer generated text writer, that has no knowledge of what you are asking. Proof is in the fact that it said use a degree wheel and a dial indicator.
I trust everything I read on the internet.
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Senior Member
When you get your alignment done, have the tech double check whatever you come up with. Extra insurance with someone else looking at it.
FFR Roadster Delivered 9/16/21
Forte 427 Fuel Injected with TKX Transmission
Forte's Axle
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Thanks CaptB, will definitely do this for the whole car alignment.
I did measure the pinion angle as Jeff suggested. The closest to 0 I can get is 1.3 degrees, and that's when I lift the rear end of the transmission until the forward shifter housing sits against the cross brace, which I assume I want to avoid, for vibration reasons. When I add 3/4" of Forte spacers, I get 1.7 degrees, which I'm going to call good enough for now
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Senior Member
You don't want 0 degree. 1.7 degree is just fine
Mrk III, 331 stroker, Borla stack injection, T5, 3:55 IRS, Power steering and brakes. Kleiner body & paint
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