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02-12-2010, 11:11 AM
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#1 |
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Registered User
 Join Date: Nov 2009
Location: San Antonio TX
Posts: 251
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transmission help
I have a stock three speed trans on my 69 SWB w/250. Now that I am driving it a little more, I noticed that in humms when I'm on the highway. Does anyone know what the problem may be? It doesn't grind when you shift and it doesn't slip from gear so I know the synchros are okay but could it be a bearing? I also noticed that there is no transmission crossmember. Is that okay too? thanks for your help.
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02-12-2010, 04:52 PM
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#2 |
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Registered User
Join Date: Dec 2008
Location: Pleak, Texas
Posts: 420
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Re: transmission help
There is no cross-member on the 3 speed. It just hangs off the bell-housing. As for the noise, have you checked your oil level? It could be low. Or just gear whine.
__________________
-1967 Chevrolet Fleetside LWB- 350 V8 w/thumpr cam, NV3500, 3.08 gears, A/C, PS  -1983 Chevy Silverado C1500- 383 stroker, TH400 -1989 Chevy Silverado K1500 SWB- 5.3L swap, 700R4, 3.42 gears -And a '66 Ford Mustang- 200 I6, C4 trans, rust bucket "The only thing we have to fear is fear itself." -FDR (and maybe rust too)  You've gotta be able to stop and steer before you can go fast! |
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02-12-2010, 04:55 PM
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#3 |
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Registered User
Join Date: Nov 2009
Location: San Antonio TX
Posts: 251
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Re: transmission help
I topped it off when I purchased it. I too was hoping that was the culprit but no improvement. I think its the bearing but I dont even know where I could buy one from.
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02-12-2010, 04:56 PM
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#4 |
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Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
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Re: transmission help
It is probably the driveshaft carrier brg. Unbolt it from the frame & spin it. It should not make any noise. It is normal for the trans not to have a crossmember under it. It looks odd, especially when it has the mounting ears under it, but that is the way they made them. It makes it easy to put in a new clutch.
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02-13-2010, 08:46 PM
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#5 |
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Registered User
Join Date: Dec 2008
Location: Pleak, Texas
Posts: 420
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Re: transmission help
If it is a bearing, it's most likely the input shaft bearing. Most parts stores should be able to get this for you. It's not too bad to replace. If I remember right, there's only 2 snap rings that hold the bearing in after you remove the collar for the input shaft.
__________________
-1967 Chevrolet Fleetside LWB- 350 V8 w/thumpr cam, NV3500, 3.08 gears, A/C, PS -1983 Chevy Silverado C1500- 383 stroker, TH400 -1989 Chevy Silverado K1500 SWB- 5.3L swap, 700R4, 3.42 gears -And a '66 Ford Mustang- 200 I6, C4 trans, rust bucket "The only thing we have to fear is fear itself." -FDR (and maybe rust too) You've gotta be able to stop and steer before you can go fast! |
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02-14-2010, 11:32 AM
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#6 |
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Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
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Re: transmission help
Trans. noises are generally in the lower gears. If it wines 1st & 2nd & is quieter in 3 it will have some brg. problems in the trans. If the noise is in 3rd going down the road I would be looking at the carrier brg., rear end or wheel brgs.
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02-15-2010, 05:13 PM
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#7 |
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Registered User
Join Date: Nov 2009
Location: San Antonio TX
Posts: 251
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Re: transmission help
My truck doesn't have a carrier bearing. it has a one piece DS. I will check the rear end as I haven't even checked to see if it had oil. I'm taking the RE cover off to see if any oil comes out. thanks for everyones help.
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