gw84

I've got a '99 Lumina LTZ (3.8L) and I was just curious if this car has the same transmission as the base and LS sedans?

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maxwedge

4t65e, the 3100 has the 4t60e.

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tblake

can the 4t65e bolt up to a 3100? just wondering

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2000 Pontiac Grand Prix GTP
(3.5" Pulley, DHP 1.0 PCM, ZZP 2.5" High Flow Downpipe, MMS Ported and Polished Lower Intake Manifold, ZZP Stage 1 Ported Throttle Body, 180° Thermostat, NGK Iridium TR6IX)


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maxwedge

I don't think so, 3800 series only.

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gw84

I've heard that the 4T60E has a lot of issues. What about the 65E? How do they compare?...hope that makes sense..

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BNaylor

Shep, the 4T65E will definitely bolt up to the 3100 Vin "J" engine which was introduced with the 2000 Lumina. Not 100% sure about the 3100 Vin "M". However, the bolt patterns between the 4T60E and 4T65E appear to be the same. Major difference on the 4T60E is the vacuum modulator, PCM control/programming and wiring to the PCM module (20 way connector versus 7 way).

The GM RPO code for 4T60E is M13. For 4T65E either M15 or MN3 depending on which GM "W" body car it is. '97 and up L67 W bodies have the MN7, 4T65E-HD.

IMO the 4T65E is more problematic than a 4T60E.

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'08 Pontiac Grand Prix GXP - LS4 5.3L V8
'02 Oldsmobile Alero GL2 - LA1 3400 V6
'01 Buick Regal GS - L67 Series II 3800 V6 Supercharged
'99 Buick Regal LS - L36 Series II 3800 V6
'03 Honda CR250R MX - 2 Stroke 250cc
'97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged
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richtazz

I agree with you Bob, the 4t60e's are more reliable than the 4t65e's. And the lower torque output of the 3100 doesn't require the extra beefyness of the 4t65e, so why add headaches.

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