LB4 and L35 motor to trans bolt pattern

[Apache59]

In the middle of doing a motor swap of these two and discovered that the motor to trans bolt patterns are not the same on these two motors. Is the only was around this to swap the transmission as well.


Other question I have is how do you unbolt the flex plate from the torque converter on the L35 Vortec like you would a 1st generation SBC?

Thanks,

Chuck

 

[Apache59]

'94 has a 700R4 tranny (Partial bell housing) and the '97 has a 4L60E(full bell housing)

Access to converter to flex plate is done after removing the starter

 

[FastOrange]

1994 should have a 4L60E, did you just answer your own question?

 

[badazzbulldog]

bottom of bell housing on the 4l60 has an inspection cover dead center of bottom of bellhousing pop that off

 

[Apache59]

Now I'm confused.... I assumed the inspection cover on the '94's transmission made it a 700R4 as it has the same motor to trans bolt pattern as say a TH350

the '97 motor and trans had access to the flexplate to converters bolts after removing the starter. Thus making the tranny a full bell housing tranny.

Did the style of the 4L60E change from an access panel Like a TH350 to a full bellhousing stlyle (starter access)....yet it is still called a 4L60E?

 

[Apache59]

Interesting.....the RPO code for the '94 calls for a 4L60E.....but it is clearly a different transmission than the 4L60E in the '97.....does anybody have any insight into this?

Thanks

Chuck

 

[Apache59]

From WIKI......


1996, GM introduced a redesigned 4L60E transmission case that incorporated a bolt-on bell (2 piece case, bell and case) housing and an 6 bolt tail housing. This 2 piece case style was first seen in 1996 and up model S-10 Blazer, S-10 Truck, GMC Jimmy, and GMC Sonoma with the 4.3L engine. In the large majority of 1998 & later applications of the 4L60E were 2 piece cases (i.e., a removable bell housing). Both transmissions are the same internally. The non-PWM (1993-1994) style 4L60Es are not interchangeable with PWM-style (1995 and later) 4L60Es. Also in 1996, GM changed the 3-2 solenoid to a different style which makes it not interchangeable with any previous models.

For the model year 1996 GM trucks, there was 2 versions of the 4L60E transmissions. One had a bolt on bell housing the other did not. Both designs have been interchangeable