How many bolts does a TH350 transmission pan have?

The chart shows the TH350 pan has 13 bolts.

How can I tell a 4L60E pan from a 4L80-E pan?

Per the chart, the TH700R4/4L60/4L60E share a roughly square 16-bolt pan, while the 4L80-E has a larger elongated pan with 17 bolts.

How many pan bolts do the Ford C4 and C6 have?

The chart shows the C4 with an 11-bolt pan and the C-6 with a 17-bolt pan.

Which transmissions share the 14-bolt AOD-style pan?

The chart labels one 14-bolt pan shape as fitting the AOD, AODE, and 4R70W.

What Chrysler transmissions are identified on this chart?

The Chrysler units shown are the 727/518 (14 bolts), A-904/999 (14 bolts), and 45RFE (15 bolts).

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Automatic Transmission Pan Identification Chart - Bolt Count & Pan Shapes

Transmission oil pan identification chart showing pan shapes and bolt counts

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Identification chart showing automatic transmission oil pan shapes and bolt counts for TH350, TH400, 4L80-E, C4, FMX and others.

AI caption September 2015 · Photo 796 of 1042

This document is an automatic transmission identification chart that shows the oil pan (gasket) outline shapes and bolt counts for common domestic automatic transmissions. Each illustration depicts the distinctive pan shape with its bolt hole pattern, labeled with the number of pan bolts and the transmission model(s) it corresponds to. GM transmissions covered include the TH350 (13 bolts), TH400 (13 bolts), TH700R4/4L60/4L60E (16 bolts), TH200 (11 bolts), 2004R (16 bolts), aluminum-case Powerglide (PG, 14 bolts), and 4L80-E (17 bolts). Ford transmissions shown are the C4 (11 bolts), C-6 (17 bolts), FMX (14 bolts), and AOD/AODE/4R70W (14 bolts). Chrysler units include the 727/518 (14 bolts), A-904/999 (14 bolts), and 45RFE (15 bolts). A reader can use this chart to identify an unknown automatic transmission installed in a vehicle simply by looking at the pan from underneath and matching its shape and bolt count to one of the fourteen outlines shown. The chart is undated and does not specify vehicle years or applications beyond the transmission model names.

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Frequently asked questions

How many bolts does a TH350 transmission pan have?: The chart shows the TH350 pan has 13 bolts.
How can I tell a 4L60E pan from a 4L80-E pan?: Per the chart, the TH700R4/4L60/4L60E share a roughly square 16-bolt pan, while the 4L80-E has a larger elongated pan with 17 bolts.
How many pan bolts do the Ford C4 and C6 have?: The chart shows the C4 with an 11-bolt pan and the C-6 with a 17-bolt pan.
Which transmissions share the 14-bolt AOD-style pan?: The chart labels one 14-bolt pan shape as fitting the AOD, AODE, and 4R70W.
What Chrysler transmissions are identified on this chart?: The Chrysler units shown are the 727/518 (14 bolts), A-904/999 (14 bolts), and 45RFE (15 bolts).