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4-speed auto by tshark
Started on: 09-20-2014 10:10 AM
Replies: 6 (237 views)
Last post by: vEnOm on 09-22-2014 01:14 PM
tshark
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Report this Post09-20-2014 10:10 AM Click Here to See the Profile for tsharkSend a Private Message to tsharkEdit/Delete MessageReply w/QuoteDirect Link to This Post
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[This message has been edited by tshark (edited 09-08-2018).]

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Report this Post09-20-2014 10:20 AM Click Here to See the Profile for jediperkSend a Private Message to jediperkEdit/Delete MessageReply w/QuoteDirect Link to This Post
4T60
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tshark
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Report this Post09-20-2014 10:27 AM Click Here to See the Profile for tsharkSend a Private Message to tsharkEdit/Delete MessageReply w/QuoteDirect Link to This Post
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[This message has been edited by tshark (edited 09-08-2018).]

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fierofool
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Report this Post09-20-2014 10:38 AM Click Here to See the Profile for fierofoolClick Here to visit fierofool's HomePageClick Here to Email fierofoolSend a Private Message to fierofoolEdit/Delete MessageReply w/QuoteDirect Link to This Post
The E series trans require an ECM to operate them. The Non-E trans operates as the Th125 stock trans.
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dobey
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Report this Post09-20-2014 11:10 AM Click Here to See the Profile for dobeySend a Private Message to dobeyEdit/Delete MessageReply w/QuoteDirect Link to This Post
GM automatic transmission names are encoded as such:

4 : Number of gears
T : orientation (L = longitudinal, T = transverse)
60 : series
E : only if transmission is electronically controlled
-HD: only if heavy duty diff is installed, and only on transverse layout as longitudinal layout has separate diff except for Corvette

Prior to the 4t60 the naming was not quite this standard. The 440t4 for example is the same as the 4t60, which are based on the TH125C case. Prior to this standardization, there were the TH125, 700R4, etc… names. Unless you're working on or restoring an older GM car or truck, you probably don't need to care about the older naming conventions (and probably will only need to care about the specific transmission in question for the build anyway).

The fact that it's an 88 GT doesn't make the install any more or less difficult. Swapping the 440t4/4t60 is the same level of difficulty regardless of what year/model Fiero you're doing the swap in (as long as it's being done on an automatic cradle). You are unlikely to find a brand new 440t4/4t60 trans anywhere, but you can probably get a rebuilt one (or just get a used one for cheap and rebuild it).

[This message has been edited by dobey (edited 09-20-2014).]

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tshark
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Report this Post09-20-2014 11:33 AM Click Here to See the Profile for tsharkSend a Private Message to tsharkEdit/Delete MessageReply w/QuoteDirect Link to This Post
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[This message has been edited by tshark (edited 09-08-2018).]

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vEnOm
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Report this Post09-22-2014 01:14 PM Click Here to See the Profile for vEnOmClick Here to Email vEnOmSend a Private Message to vEnOmEdit/Delete MessageReply w/QuoteDirect Link to This Post
Yes, all years require modifications to the cradle for the rearward transmission mount (the one near the trunk). Basically a new set of sloted holes need to be drilled for the trans mount. However, the '88 needs a little bit more modification. Use this as reference. http://www.pontiacperforman...es/4_speed_swap.html

I did this swap on my 87 with 3.73 gears. Now I'm doing a manual 4 speed swap.
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