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| NOTES |
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| Please make sure you have your e-mail address on all of your messages sent to us. |
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| If you have been told by your local dealer that a stock part has been discontinued, asking us the same question will not change that fact. |
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| The GM high performance discussion board is mainly for our customers to get together and communicate, but it is also for communication with us. |
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Chevrolet - TREMEC T56 SIX SPEED TRANSMISSION | |
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The Retro-Fit T56 transmission can be used for many applications with small modifications. We also sell a service manual for this transmission. This is in the Price Search along with the GM and SC parts. We don't have an Excel price list from Tremec for you to download as of yet. Key - tremectrans |
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| Featuring Chevrolet and GM Performance Parts. |
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WEB SITE NAVIGATION INFORMATION | |
| If you have you just came from a search engine and are stuck with no navigation, turn on Java Scripts in your Web browser, reload the page, then you can turn off Java Scripts again. Also, people using Internet Explorer have to use the pull down tab next to the back button to return to a search engine. More information on this is on our help page. |
| GM and Chevrolet part prices are in the Price & Parts search. Keys are to be used with the Price & Parts Search. Enter a Key, part number, GM, SC, or a key word, like 502, into the Price & Parts search to see if we have it on our site. Use GM for a list of both GM and GMPP parts. Use SC for a list of all Chevrolet exclusive parts. Aftermarket company prices are on downloadable Price Sheets or on their pages. The Page Search is for searching the pages of our Web site. More information on this is on our help page. |
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TREMEC RETRO-FIT T56 DESCRIPTION | |
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 TREMEC T-56 Six Speed Transmission Click on the Tremec Logo above to go to Tremec’s web site.
TREMEC’s GM aftermarket replacement T-56 six speed is designed to replace the T5 five speed in the 82-92 Camaros and
Firebirds. This transmission can be used for many other applications with small modifications.Visit Tremec’s T56 page. View our Helpful Pictures T56 installation page. Installation is not as hard as you might think. Use the links in the Tremec T56 Navigation bar to help you understand what it will take to do the installation. |
| Gear-ratio Spread: 2.97:1, 2.07:1, 1.43:1, 1.00:1, 0.80:1, 0.62:1 forward, and 3.28:1 reverse Torque: 400 ft./lbs., Dry Weight: 115-120 lbs., Spline Data: 26T input, 27T output |
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TREMEC T56 NAVIGATION | |
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[Retro-Fit T56 Main Page]
[Retro-Fit T56 Helpful Pictures]
[Retro-Fit T56 Pics & Dimensions] [Phillip West’s Retro-Fit T56 Conversion] [GM’s Stock Replacement T-56’s] |
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TREMEC T56 SERVICE MANUAL | |
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Tremec T56 Service Manual
Now you can have your own service manual made just for the T56.
P/N T56-manual |
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DIFFERENCE BETWEEN THE STOCK T56 AND THE AFTERMARKET | |
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1. Can use stock bell housing and clutch* 2. Mechanical speedo gear hookup. *Note: We can drill adapter to fit standard GM bell housing. Write or call for more detailed information. |
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OTHER AVAILABLE PARTS FOR THE RETRO-FIT T56 | |
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P/N 12085485 - Connector, back up lamp. (Pic) P/N 12101857 - Connector, shifter. (Pic) Prices for these are still on the price list. Chevy High Performance Magazine Article On This Transmission Chevy High Performance Magazine Article On the Skulte Crossmember Skulte Performance Designs makes a crossmember for this transmission. Click here to see a photo of one. You will have to get the crossmember from them. http://www.skulte.com/, E-Mail [email protected], Phone: 845-623-4389 |
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T56 RETRO-FIT FAQ’S | |
| Question | Answer |
| Can I get just the front adapter plate? | No, sorry. Tremec does not offer this separately. |
| Can I get the 2.66 first gear? | No, it’s only available with the 2.97 first gear. |
| Do I need the T-5 bell housing to bolt this in an older Camaro or Chevelle? | No, we can drill the adapter plate so it will fit a standard bell housing. |
| How much do you charge to drill the adapter plate? | Price to drill adapter plate for straight up Bell Housing: $40.00 |
| What clutch do I need? | You can use a stock style clutch with a 26 spline disc. |
| Will the Transmission shifter fit my stock console hole? | No, you will need to modify a shifter to make this work. |
| Does The RFT56 come with a shift lever and shift handle like it shows in the BorgWarner picture? | No |
| What is the factory torque rating on this transmission? | 400 ft./lbs. |
| Can the shifter be moved forward to the plate I see on this transmission? | This is only a removable plate for quick visual inspection of the inside of this transmission. It is not a second location for the shifter. |
| What type of lube is recommended for TREMEC T56 transmissions? | Dextron III |
| Do you have any suggestions for installing an aftermarket shifter? | The major problem with aftermarket shifters is that they have stops on them. To install them correctly, you will have to remove the stops completely. TREMEC transmissions are built with internal stops. |
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FROM CAR CRAFT MAGAZINE JANUARY 1994 | |
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Tremec’s GM aftermarket replacement T56 assembly uses a
26-spline input shaft that mates with the existing GM clutch assembly.
Also includes a special adapter plate that bolts the trans to the stock
T5 bellhousing. BorgWarner developed the kit using a ’92 Camaro equipped
with the optional ’89-’92 dual-catalyst exhaust system. Although the
exhaust pipes remain unmodified, the hanger that previously attached the
pipes to the trans mount is discarded. Most GM F-cars (Camaros, Firebirds,
and Trans Ams) use only a single catalyst, which, if anything, should provide even
more clearance for the trans. The kit moves the ’90-’92 T5 trans
mount (PN 17990869) 1.9 inches rearward to mate with a sectioned
and rewelded ’93 GM F-car trans crossmember. This in turn requires
correspondingly shortening the rear differential torque arm by
1.9 inches. Retain the stock 27-spline slip-yoke, but shorten the
driveshaft by 2 inches.
Bellhousing And Clutch Linkage
The ’93 F-car uses a “pull-type” clutch assembly, and the T56’s
front face is different from traditional GM manual transmissions.
BorgWarner’s (now TREMEC’s) adapter plate provides the solution - it bolts
the new trans to the earlier T5 bellhousing and permits retention
of the existing T5 V8 clutch system without alteration.Stock T5 V8 bellhousings rotate the T5 trans 18 degrees counterclockwise from “straight up”. BorgWarner’s (now TREMEC’s) adapter plate returns the T56’s orientation to “straight up”. Old Muncie/T10/ Saginaw transmissions also mount “straight up”. Use of the old four-speed bellhousings with the T56 adapter would thus rotate the new trans clockwise from the vertical (leaving the mounting pad nonparallel to the crossmember). Instead, use a T5 bellhousing when replacing an old four-speed with a T56. The ’83 F-car T5 V8 bellhousing is the best choice for old muscle car retrofit applications, as it still uses mechanical clutch linkage. This unit is no longer available from GM, so ask the salvage yards for “Hollander Interchange No.784”. Lakewood offers an equivalent scattershield (PN 15015). The ’84-’92 Camaros use a bell housing set up for hydraulic linkage, GM PN 14075722 or Lakewood scattershield PN 15020. Eventually, BorgWarner may machine dual trans mounting patters in the adapter to allow its use with both traditional and T5 GM bellhousings. Crossmember Mods
As we go to press, no detailed drawings of the mods required
to mate a ’93 F-car T56 crossmember to the earlier F-car exist,
so it’s a cut-and-try proposition. The ’83-and-later F-car installation
uses the original T5 mount. For earlier conversions, use the
stock 3.75-inch bolt spacing (non-Turbo 400) mount for the chassis in
question, but attach it to the trans using metric M10x1.5
x30 mounting bolts (PN 10141996).Note: The rest of this article is continued on the Retro-Fit T56 Helpful Pictures page. |
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