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crazypete · 09-10-2004, 08:59 AM

I had a nasty atf leak. I lost most of the fluid in my AOD to the point where it would go into neutral when I stopped the car at a light and I would need to rev it up to pump whatever fluid was left through the system to get it to jump back into gear and move. Throughout this whole process, not a sound.

I am guessing it is the engine and not the transmission. You said it increases with engine rpm? Is that in neutral? In neutral it's only the flexplate and the torque converter in motion. I cannot imagine a TC making whining noises. Check the following

1. The clutch fan for the radiator. This has been known to rub the fan shroud and make that exact noise.
2. Remove the dust shield at the bottom of the transmission bellhousing and look to see if the TC has paint stripped off. Check the teeth on the flexplate. Occasionally starters loosen up and touch. That would be rpm dependant and make a helluva lot of noise.
3. Tighen the header bolts and at the collector to h-pipe bolts. Loose exhaust makes all kinds of ticking and whining noises.
4. Pop the distributor cap off and look at the underside. I once had a rotor rub the cap and make a whining sound. If you feel motivated and you dont mind setting the timing, yank the distributor and check the distributor gear. You might want to matchmark the rotor and dist body so you have a good idea where to put it back.
5. Give it an oilchange and overfill it a bit. See if the sound goes away or changes tone. If this is it, you are basically screwed because it is something inside the motor. Timing chain sounds good to me. At least that's easy to fix.

If it is speed dependant, it might be your gears. Pulling the axle cover might not necessarily show anything since failing gears usually look just like new gears anyway. Pull off the driveshaft and put a pan under the tailshaft to catch the ATF that will leak out and then start it and "get her up to 50 or 60 on the speedo". This will rule out/in the rear end definitively. Neutral whining rules out the AOD. Removing the accessory belt rules out the acessories and the clutchfan. Well, thats all I can think of. If you had PS, I would totally suspect that.

good luck and keep us posted!

Crazy Pete

09-10-2004, 08:59 AM	#8
crazypete Registered Member Join Date: Sep 2002 Location: Boston Posts: 592	I had a nasty atf leak. I lost most of the fluid in my AOD to the point where it would go into neutral when I stopped the car at a light and I would need to rev it up to pump whatever fluid was left through the system to get it to jump back into gear and move. Throughout this whole process, not a sound. I am guessing it is the engine and not the transmission. You said it increases with engine rpm? Is that in neutral? In neutral it's only the flexplate and the torque converter in motion. I cannot imagine a TC making whining noises. Check the following 1. The clutch fan for the radiator. This has been known to rub the fan shroud and make that exact noise. 2. Remove the dust shield at the bottom of the transmission bellhousing and look to see if the TC has paint stripped off. Check the teeth on the flexplate. Occasionally starters loosen up and touch. That would be rpm dependant and make a helluva lot of noise. 3. Tighen the header bolts and at the collector to h-pipe bolts. Loose exhaust makes all kinds of ticking and whining noises. 4. Pop the distributor cap off and look at the underside. I once had a rotor rub the cap and make a whining sound. If you feel motivated and you dont mind setting the timing, yank the distributor and check the distributor gear. You might want to matchmark the rotor and dist body so you have a good idea where to put it back. 5. Give it an oilchange and overfill it a bit. See if the sound goes away or changes tone. If this is it, you are basically screwed because it is something inside the motor. Timing chain sounds good to me. At least that's easy to fix. If it is speed dependant, it might be your gears. Pulling the axle cover might not necessarily show anything since failing gears usually look just like new gears anyway. Pull off the driveshaft and put a pan under the tailshaft to catch the ATF that will leak out and then start it and "get her up to 50 or 60 on the speedo". This will rule out/in the rear end definitively. Neutral whining rules out the AOD. Removing the accessory belt rules out the acessories and the clutchfan. Well, thats all I can think of. If you had PS, I would totally suspect that. good luck and keep us posted! Crazy Pete __________________ 91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior