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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-18-2007, 10:35 PM   #1
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Default New Transmission?

1994 Bonneville SSEi, 179,000, CAI, TR 55'*

I have been having multiple transmission problems ranging from shudders to slips. I think this spring is going to be time for a used or re manufactured trans. As of right now it shudders when it is cold and I hear a loud rumble/grind from the firewall in front of me. It also has a hard time reaching high speeds compared to how it used to and I can definetly feel it slipping quite often. I also hear a "boing" every now and then after I come to a complete stop. (It sounds like a spring relieving tension all at once.)

So... I will be in the market for a new or used transmission and was wondering if the 1994 SSEi came with the HD (Heavy Duty) or normal 4T60-E? I thought that the HD was only used in the older 90'* cars but I am not sure.

Josh
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Old 11-19-2007, 08:41 AM   #2
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You will need an HD.

Being a 4T60, that 179K is very impressive. Often the diff'* would try to break out of the casing long before that. The reason I mention this is your description of the grinding etc. It becomes more costly to rebuild when the diff has turned to metal soup and has broken the trans casing.
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Old 11-19-2007, 01:35 PM   #3
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So... The 4T60 Heavy Duty is the transmission that is in there now? And if I get the the HD 4T60-E I should just be able to swap out the trans? Should I go ahead and get a new torque converter right away??

Thanks,
Josh

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1994 SSEi, CAI, TR 55'*, custom painted rear drums and engine compartment, JL subwoofer
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Old 11-19-2007, 01:40 PM   #4
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I would replace the torque converter right away. Easier to do it now
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