Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: ii

TOROTRAK PLC

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

NO

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

NO

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

NO

An event changing the breakdown of voting rights

NO

Other (please specify):

A change in the total voting rights notified by TOROTRAK PLC on 2 June 2011

YES

3. Full name of person(s) subject to thenotification obligation: iii

Allison Transmission Holdings, Inc.

TCG Holdings, L.L.C.

4. Full name of shareholder(s)  (if different from 3.):iv

Allison Transmission, Inc.

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

2 June 2011

6. Date on which issuer notified:

6 June 2011

7. Threshold(s) that is/are crossed orreached: vi, vii

9%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

Ordinary shares of 10 pence each

14,608,290

14,608,290

14,608,290

14,608,290

N/A

8.92%

N/A

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

N/A

N/A

N/A

N/A

N/A

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

N/A

N/A

N/A

N/A

N/A

Nominal

Delta

N/A

N/A

Total (A+B+C)

Number of voting rights

Percentage of voting rights

14,608,290

8.92%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi

Allison Transmission, Inc. is a wholly owned subsidiary of Allison Transmission Holdings, Inc., which is majority controlled by investment funds managed by TCG Holdings, L.L.C.

Proxy Voting:

10. Name of the proxy holder:

N/A

11. Number of voting rights proxy holder will ceaseto hold:

12. Date on which proxy holder will cease to holdvoting rights:

13. Additional information:

This notification has been prepared using the total voting rights figure of 163,763,133 as set out in the public announcement made by Torotrak plc on 2 June 2011.

14. Contact name:

Eric C. Scroggins, Esq.Allison Transmission, Inc.4700 W. 10th StreetIndianapolisIndiana 46222USA

15. Contact telephone number:

Tel: +317-242-7017