Stealth Conversions, The Parts Division of JTR (Jaguars That Run)

Volvo 700 Series V-8
Engine Modification Instructions

Stealth Conversions
The Parts Division of JTR (Jaguars That Run)

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Engine Modification Instructions for Volvo 700 Series V8 engine swap
Please click this link to view our Volvo 700 Series V-8 Motor Mounting Kit — Volvo 700 V8 Conversion
700-R4 (or 4L60) automatic overdrive transmission Borg-Warner T5 5-speed manual transmission

Comparison of Transmissions

Volvo 700 V8 Motor Mounting Kit (click for details),
part #VOL-700, $270

TRANSMISSION COMPARISON

The two most common transmissions to consider for the V8 Volvo are shown above: The 700-R4 (or 4L60) automatic overdrive transmission is shown on the left, and the Borg-Warner T5 5-speed manual transmission is shown on the right.

The purpose of showing these transmissions is so you understand the size difference between the manual transmission and the automatic transmission. They are both the same length, but the widths and profiles are different. The manual transmission can be installed with minimal transmission tunnel modifications, but the automatic transmission requires substantial metal movement (hammering) on the transmission tunnel, and some cutting.

Most of the hammering required for the automatic transmission installation is to make room for the transmission dipstick tube (not shown), the servo housing (arrow), and the transmission oil cooler lines (not shown). Also, hammering is required to make room for the shift linkage.

Volvo 700 Engine Compartment

Volvo 700 Engine Compartment

Above: FIREWALL MODIFICATIONS, BEFORE

This is the stock firewall/transmission tunnel of a 1985 740 Volvo.

It must be substantially altered for the 700-R4 transmission.

When installing the 700-R4 (or 4L60-E) transmission, the transmission tunnel needs to be enlarged as shown by the line drawn on the firewall. The metal has to be "worked" quite a bit to get it to move. It may take several hours to hammer on the transmission tunnel/firewall area to move the metal, as you will need rest breaks.

The key to moving the metal without cutting the metal is to work the metal by hammering around the entire area that needs to be moved. The metal will gradually move into position as you work it with a semi-heavy hammer. A 6-pound sledge hammer is a good hammer to start with.
When using the Borg-Warner T5 transmission or T56 transmission, very little transmission tunnel modifications are required.

Volvo 700 Engine Compartment

Volvo 700 Engine Compartment

above: FIREWALL MODIFICATIONS, AFTER

This is the firewall/transmission tunnel of a 1985 740 Volvo that is ready for a V8/ 700-R4 transmission.

This area has been hammered in to provide clearance for the 1993-1997 Camaro LT1 exhaust manifold. Hammering in this area also makes it easier for the muffler shop to install the headpipe to the Camaro manifold.

The transmission tunnel could not be modified with a 3 pound hammer, because it wasn’t heavy enough to easily move the metal. A 6 pound hammer was then purchased. 6-pounder better than 3-pounder!

The two areas marked on the firewall, just above the transmission tunnel are where the firewall needs to be moved back when running a 1987-1993 Ford Mustang 5.0 V8 with an engine-driven clutch fan.

Volvo 700,  Stock Transmission Firewall

Stock Transmission Firewall

TRANSMISSION TUNNEL/FIREWALL, STOCK

This is another photograph of the stock transmission tunnel and firewall.

The firewall/transmission tunnel will have to be widened as shown by the line to fit the 700-R4 (or 4L60-E) transmission.

Volvo 700 V-8, Modified Transmission Tunnel / Firewall

Modified Transmission Tunnel / Firewall

TRANSMISSION TUNNEL/FIREWALL,
MODIFIED FOR AUTOMATIC TRANSMISSION

A lot of hammering was required to move the metal, and it does not look pretty.

Some people have suggested that transmission tunnel should simply be cut out the transmission tunnel, and then, weld an appropriately shaped piece of metal in place, instead of the "crude" method of hammering the transmission tunnel. The reality is that it would take more time, and you would probably end up burning the interior of the car while doing it. The hammering method is very effective, and it is not noticeable inside the car after the swap is done.

Volvo 700, Stock Transmission Tunnel / Firewallt<

Stock Transmission Tunnel / Firewall

Transmission Tunnel / Firewall, stock

This is the stock transmission tunnel.The firewall/transmission tunnel will have to widened as shown by the line to fit the 700-R4 (or 4L60-E) transmission.

Volvo 700 V-8, Transmission Tunnel/Firewall, modified for 700-R4<
Transmission Tunnel/Firewall, modified for 700-R4

Firewall/transmission tunnel,
modified for 700-R4 (or 4L60-E) transmission.

A lot of hammering was required to move the metal as shown.

While some people may claim the Ford V8 swap requires no transmission tunnel mods, we have test fitted Ford engines into this car and the transmission tunnel mods are similar.

Notice that not a lot of hammering is required in the driver’s footwell area, which could inhibit throttle pedal movement. If you look carefully, you can see how the "ledge" on the firewall was hammered against the firewall to improve distributor clearance.

Volvo 700 V-8, Modifications to Passenger Side Frame Rail

Modifications to Passenger Side Frame Rail

PASSENGER SIDE FRAME RAIL MODIFICATIONS

To fit the1993–1997 Camaro LT1 and the 1985–1992 TPI exhaust manifolds, the frame rail needs to be modified as shown. The TBI exhaust manifold and center dump manifold do no require this mod.

To make it easier to move the frame rail outward, first hammer the center of the top of the frame rail downward in the area marked "1" for exhaust manifold clearance.

Some mounts have locating tabs (arrow), which must be removed for the V8 swap. This is easily done with a hacksaw, or a grinder.

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JTR engine swapping manuals are available directly from JTR Publishing,
As well as through a number of retailers, including:
Summit Racing (S-10: Part #JTR-S10; Jaguar: Part #JTR-JAG),
JEGS (S-10: Part #116549; TPI & TBI: Part #117942),
Steve Smith Autosports (S-10: Part #S212; TPI & TBI: Part #S195), and
Classic Motorbooks (S-10: Part #116549; TPI & TBI: Part #117942;
  Jaguar: Part #118438; Datsun Z: Part #115501; Volvo 200: Part #122587).


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