5L40E Differences

Technica l Service Informa tion

GM/BMW 5L40E TRANSMISSION PARTS DIFFERENCES COMPLAINT:

When the technician is rebuilding a 5L40E transmission from a Cadillac or BMW, BMW, some hard parts which may be acquired as “good used” may not fit the particular application being rebuilt.

CAUSE:

Although the 5L40E may look the same for both the Cadillac and the BMW models, there are some very distinct dimensional differences in various parts that make interchangeability impossible.

bod y. CORRECTION: Figure 1 illustrates the Cadillac bell housing wh ich also incorporates the pump body Figure 2 illustrates the BMW bell housing which also incorporates the pump body. Figure 3 Illustrates the different stator shaft lengths between the Cadillac and BMW models. Figure 4 illustrates the different input shaft lengths between the Cadillac and BMW models which is an integral part of o f the forward drum. Figure 5 Illustrates the BMW pump cover. Figure 6 illustrates the BMW and/or Cadillac pump cov er er.. Figure 7 illustrates the difference in the Line Boost Valve Valve between Cadillac and BMW models which is the outer most valve assembly in the pressure regulator valve line-up located in the pump cover.

Many thanks to Paul from Hardparts For Transmissions for his help in providing this information.

Copyright © 2006 ATSG ATSG

Automatic Transmission Service Group


TRANSMISSION PARTS DIFFERENCES

CADILLAC

STARTER OPENING AT 10 O’CLOCK POSITION

Figure 1

STARTER OPENING AT 2 O'CLOCK POSITION

BMW

Figure 2



TRANSMISSION PARTS DIFFERENCES STATOR SHAFT LENGTH

CADILLAC 3.37 IN 85.60 MM

BMW 3.22 IN 81.79 MM

Figure 3 CADILLAC WILL HAVE AN ID GROOVE HERE

INPUT SHAFT LENGTH CADILLAC 11.69 IN 296.93 MM

BMW 11.50 IN 292 MM

Figure 4



TRANSMISSION PARTS DIFFERENCES BMW PUMP COVER

GM

Figure 5

BMW OR CADILLAC PUMP COVER

GM

Figure 6



TRANSMISSION PARTS DIFFERENCES

LINE BOOST VALVE

BMW

CADILLAC

Figure 7


5L40E Differences

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