To check the FD ratio pull the speedometer sensor and look at the color of the gear. For instance a blue gear will be on a 3:33:1 FDR transmission, a white gear would probably be 3.18 but I've got to find the chart to give you exact numbers.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
Got a better look at the transaxle and there are some differences.
The dipstick along with the tube is twice as long. The upper vent tube is just a tube going nowhere where as in the Fiero there was a little cap there. Should I put some kind of one way valve on it or a filter?
[This message has been edited by cebix (edited 08-04-2019).]
Anybody has any ideas about these differences? I attach a photo of an original THM125C from a Fiero and the differences in my Grand Am transaxle.
1. The electrical connector is 180 degrees out of the original one. Is that a problem? 2. The cooling lines - the upper original cap is just a tube here. The lower ones where they go to the radiator - one is blocked off. What should I do about this? Is this original?
Here's an original:
And here's my Grand Am one:
[This message has been edited by cebix (edited 08-06-2019).]
The blocked off cooling line is just pinched off when it was cut. Your Fiero cooling lines should transfer over. The NSS (Neutral Safety Switch) and select arm will transfer over from the Fiero. If you can change the vent tube, go for it,if not, I don't think it would be a problem.